diff --git a/iOS/Plugins/FlipperKitUIDebuggerPlugin/FlipperKitUIDebuggerPlugin/Descriptors/UIDMetadataRegister.h b/iOS/Plugins/FlipperKitUIDebuggerPlugin/FlipperKitUIDebuggerPlugin/Descriptors/UIDMetadataRegister.h
index ef880b9e55a..9f1315b673d 100644
--- a/iOS/Plugins/FlipperKitUIDebuggerPlugin/FlipperKitUIDebuggerPlugin/Descriptors/UIDMetadataRegister.h
+++ b/iOS/Plugins/FlipperKitUIDebuggerPlugin/FlipperKitUIDebuggerPlugin/Descriptors/UIDMetadataRegister.h
@@ -26,7 +26,15 @@ FOUNDATION_EXPORT NSString* const UIDEBUGGER_METADATA_TYPE_DOCUMENTATION;
 - (UIDMetadataId)registerMetadataWithType:(NSString*)type
                                      name:(NSString*)name
                                 isMutable:(bool)isMutable
-                                definedBy:(UIDMetadataId)definedById;
+                                definedBy:(UIDMetadataId)parent;
+
+- (UIDMetadataId)registerMetadataWithType:(NSString*)type
+                                     name:(NSString*)name
+                                isMutable:(bool)isMutable
+                                definedBy:(UIDMetadataId)parent
+                         customAttributes:
+                             (nullable NSDictionary<NSString*, id>*)
+                                 customAttributes;
 
 - (NSDictionary<UIDMetadataId, UIDMetadata*>*)extractPendingMetadata;
 
diff --git a/iOS/Plugins/FlipperKitUIDebuggerPlugin/FlipperKitUIDebuggerPlugin/Descriptors/UIDMetadataRegister.m b/iOS/Plugins/FlipperKitUIDebuggerPlugin/FlipperKitUIDebuggerPlugin/Descriptors/UIDMetadataRegister.m
index 519cb87e005..0b48f7c1fbf 100644
--- a/iOS/Plugins/FlipperKitUIDebuggerPlugin/FlipperKitUIDebuggerPlugin/Descriptors/UIDMetadataRegister.m
+++ b/iOS/Plugins/FlipperKitUIDebuggerPlugin/FlipperKitUIDebuggerPlugin/Descriptors/UIDMetadataRegister.m
@@ -65,12 +65,34 @@ - (UIDMetadataId)registerMetadataWithType:(NSString*)type
                                      name:(NSString*)name
                                 isMutable:(bool)isMutable
                                 definedBy:(UIDMetadataId)parent {
+  return [self registerMetadataWithType:type
+                                   name:name
+                              isMutable:isMutable
+                              definedBy:parent
+                       customAttributes:nil];
+}
+
+- (UIDMetadataId)registerMetadataWithType:(NSString*)type
+                                     name:(NSString*)name
+                                isMutable:(bool)isMutable
+                                definedBy:(UIDMetadataId)parent
+                         customAttributes:
+                             (nullable NSDictionary<NSString*, id>*)
+                                 customAttributes {
+  if (!parent) {
+    parent = _rootId;
+  }
+
   UIDMetadataId identifier = @(++_generator);
-  UIDMetadata* metadata = [[UIDMetadata alloc] initWithIdentifier:identifier
-                                                             type:type
-                                                             name:name
-                                                        isMutable:isMutable
-                                                           parent:parent];
+  UIDMetadata* metadata =
+      [[UIDMetadata alloc] initWithIdentifier:identifier
+                                         type:type
+                                         name:name
+                                    isMutable:isMutable
+                                       parent:parent
+                               possibleValues:nil
+                                         tags:nil
+                             customAttributes:customAttributes];
 
   [_lock lock];
   if (![_register objectForKey:parent]) {
diff --git a/iOS/Plugins/FlipperKitUIDebuggerPlugin/FlipperKitUIDebuggerPlugin/Model/UIDMetadata.h b/iOS/Plugins/FlipperKitUIDebuggerPlugin/FlipperKitUIDebuggerPlugin/Model/UIDMetadata.h
index e1c46b220f2..697df7abf99 100644
--- a/iOS/Plugins/FlipperKitUIDebuggerPlugin/FlipperKitUIDebuggerPlugin/Model/UIDMetadata.h
+++ b/iOS/Plugins/FlipperKitUIDebuggerPlugin/FlipperKitUIDebuggerPlugin/Model/UIDMetadata.h
@@ -23,32 +23,33 @@ typedef NSNumber* UIDMetadataId;
  */
 @interface UIDMetadata : NSObject
 
+#pragma mark - Included in the wire protocol
+
 @property(nonatomic, readonly) UIDMetadataId identifier;
 @property(nonatomic, strong, readonly) NSString* type;
-@property(nonatomic, readonly) UIDMetadataId parent;
 @property(nonatomic, strong, readonly) NSString* name;
 @property(nonatomic, readonly) bool isMutable;
-@property(nonatomic, strong, readonly)
+@property(nonatomic, readonly, nullable)
+    NSDictionary<NSString*, id>* customAttributes;
+
+#pragma mark -  Not included in the wire protocol
+
+@property(nonatomic, readonly) UIDMetadataId parent;
+@property(nonatomic, strong, readonly, nullable)
     NSSet<UIDInspectableValue*>* possibleValues;
-@property(nonatomic, strong, readonly) NSSet<NSString*>* tags;
-
-- (instancetype)initWithIdentifier:(UIDMetadataId)identifier
-                              type:(NSString*)type
-                              name:(NSString*)name;
-
-- (instancetype)initWithIdentifier:(UIDMetadataId)identifier
-                              type:(NSString*)type
-                              name:(NSString*)name
-                         isMutable:(bool)isMutable
-                            parent:(UIDMetadataId)parent;
-
-- (instancetype)initWithIdentifier:(UIDMetadataId)identifier
-                              type:(NSString*)type
-                              name:(NSString*)name
-                         isMutable:(bool)isMutable
-                            parent:(UIDMetadataId)parent
-                    possibleValues:(NSSet<UIDInspectableValue*>*)possibleValues
-                              tags:(NSSet<NSString*>*)tags;
+@property(nonatomic, strong, readonly, nullable) NSSet<NSString*>* tags;
+
+#pragma mark -
+
+- (instancetype)
+    initWithIdentifier:(UIDMetadataId)identifier
+                  type:(NSString*)type
+                  name:(NSString*)name
+             isMutable:(bool)isMutable
+                parent:(UIDMetadataId)parent
+        possibleValues:(nullable NSSet<UIDInspectableValue*>*)possibleValues
+                  tags:(nullable NSSet<NSString*>*)tags
+      customAttributes:(nullable NSDictionary<NSString*, id>*)customAttributes;
 @end
 
 NS_ASSUME_NONNULL_END
diff --git a/iOS/Plugins/FlipperKitUIDebuggerPlugin/FlipperKitUIDebuggerPlugin/Model/UIDMetadata.m b/iOS/Plugins/FlipperKitUIDebuggerPlugin/FlipperKitUIDebuggerPlugin/Model/UIDMetadata.m
index 81bc2afdb72..ed21cc85f91 100644
--- a/iOS/Plugins/FlipperKitUIDebuggerPlugin/FlipperKitUIDebuggerPlugin/Model/UIDMetadata.m
+++ b/iOS/Plugins/FlipperKitUIDebuggerPlugin/FlipperKitUIDebuggerPlugin/Model/UIDMetadata.m
@@ -12,48 +12,25 @@
 
 @implementation UIDMetadata
 
-- (instancetype)initWithIdentifier:(UIDMetadataId)identifier
-                              type:(NSString*)type
-                              name:(NSString*)name {
-  return [self initWithIdentifier:identifier
-                             type:type
-                             name:name
-                        isMutable:false
-                           parent:@0
-                   possibleValues:[NSSet set]
-                             tags:[NSSet set]];
-}
-
-- (instancetype)initWithIdentifier:(UIDMetadataId)identifier
-                              type:(NSString*)type
-                              name:(NSString*)name
-                         isMutable:(bool)isMutable
-                            parent:(UIDMetadataId)parent {
-  return [self initWithIdentifier:identifier
-                             type:type
-                             name:name
-                        isMutable:isMutable
-                           parent:parent
-                   possibleValues:[NSSet set]
-                             tags:[NSSet set]];
-}
-
 - (instancetype)initWithIdentifier:(UIDMetadataId)identifier
                               type:(NSString*)type
                               name:(NSString*)name
                          isMutable:(bool)isMutable
                             parent:(UIDMetadataId)parent
                     possibleValues:(NSSet<UIDInspectableValue*>*)possibleValues
-                              tags:(NSSet<NSString*>*)tags {
+                              tags:(NSSet<NSString*>*)tags
+                  customAttributes:
+                      (nullable NSDictionary<NSString*, id>*)customAttributes {
   self = [super init];
   if (self) {
     _identifier = identifier;
     _type = type;
     _name = name;
     _isMutable = isMutable;
-    _parent = parent;
-    _possibleValues = possibleValues;
-    _tags = tags;
+    _parent = parent ?: @0;
+    _possibleValues = possibleValues ?: [NSSet set];
+    _tags = tags ?: [NSSet set];
+    _customAttributes = customAttributes;
   }
   return self;
 }
diff --git a/iOS/Plugins/FlipperKitUIDebuggerPlugin/FlipperKitUIDebuggerPlugin/Serializers/UIDMetadata+Foundation.m b/iOS/Plugins/FlipperKitUIDebuggerPlugin/FlipperKitUIDebuggerPlugin/Serializers/UIDMetadata+Foundation.m
index a47cd1fedfe..67527b00122 100644
--- a/iOS/Plugins/FlipperKitUIDebuggerPlugin/FlipperKitUIDebuggerPlugin/Serializers/UIDMetadata+Foundation.m
+++ b/iOS/Plugins/FlipperKitUIDebuggerPlugin/FlipperKitUIDebuggerPlugin/Serializers/UIDMetadata+Foundation.m
@@ -7,6 +7,7 @@
 
 #if FB_SONARKIT_ENABLED
 
+#import "NSDictionary+Foundation.h"
 #import "NSSet+Foundation.h"
 #import "UIDMetadata+Foundation.h"
 
@@ -14,12 +15,20 @@
 @implementation UIDMetadata (Foundation)
 
 - (id)toFoundation {
-  return @{
+  NSMutableDictionary* result = [NSMutableDictionary dictionary];
+
+  [result addEntriesFromDictionary:@{
     @"id" : self.identifier,
     @"type" : self.type,
     @"name" : self.name,
     @"mutable" : [NSNumber numberWithBool:self.isMutable],
-  };
+  }];
+
+  if (self.customAttributes != nil) {
+    result[@"customAttributes"] = [self.customAttributes toFoundation];
+  }
+
+  return [result copy];
 }
 
 @end