diff --git a/applications/asset_tracker_v2/Kconfig.sysbuild b/applications/asset_tracker_v2/Kconfig.sysbuild
index 1dd94979b4f2..d0243825093a 100644
--- a/applications/asset_tracker_v2/Kconfig.sysbuild
+++ b/applications/asset_tracker_v2/Kconfig.sysbuild
@@ -14,6 +14,9 @@ config SECURE_BOOT
 config SECURE_BOOT_APPCORE
 	default y if BOARD_NRF9160DK_NRF9160_NS
 
+config WIFI_NRF700X
+	default y if BOARD_THINGY91X_NRF9151_NS
+
 config PM_EXTERNAL_FLASH_MCUBOOT_SECONDARY
 	default y if BOARD_NRF9151DK_NRF9151_NS || BOARD_NRF9161DK_NRF9161_NS
 	default y if BOARD_NRF9160DK_NRF9160_NS \
diff --git a/applications/asset_tracker_v2/boards/thingy91x_nrf9151_ns.conf b/applications/asset_tracker_v2/boards/thingy91x_nrf9151_ns.conf
index c4b9e54f0e79..3096f5ef7848 100644
--- a/applications/asset_tracker_v2/boards/thingy91x_nrf9151_ns.conf
+++ b/applications/asset_tracker_v2/boards/thingy91x_nrf9151_ns.conf
@@ -77,3 +77,7 @@ CONFIG_NET_RX_STACK_SIZE=4096
 CONFIG_NET_TC_TX_COUNT=1
 CONFIG_NET_MAX_CONTEXTS=5
 CONFIG_NET_MGMT_EVENT_STACK_SIZE=1024
+
+# Enable external flash
+CONFIG_SPI_NOR_SFDP_DEVICETREE=y
+CONFIG_PM_OVERRIDE_EXTERNAL_DRIVER_CHECK=y
diff --git a/applications/asset_tracker_v2/boards/thingy91x_nrf9151_ns.overlay b/applications/asset_tracker_v2/boards/thingy91x_nrf9151_ns.overlay
index e46ea2e715ed..56d1de20723c 100644
--- a/applications/asset_tracker_v2/boards/thingy91x_nrf9151_ns.overlay
+++ b/applications/asset_tracker_v2/boards/thingy91x_nrf9151_ns.overlay
@@ -13,6 +13,7 @@
 		pressure-sensor = &bme680;
 		iaq-sensor = &bme680;
 		accelerometer = &accelerometer_lp;
+		ext-flash = &flash_ext;
 	};
 };
 
diff --git a/applications/asset_tracker_v2/sysbuild/mcuboot/boards/thingy91x_nrf9151.conf b/applications/asset_tracker_v2/sysbuild/mcuboot/boards/thingy91x_nrf9151.conf
index d8ebd794fa15..5558a0e48d46 100644
--- a/applications/asset_tracker_v2/sysbuild/mcuboot/boards/thingy91x_nrf9151.conf
+++ b/applications/asset_tracker_v2/sysbuild/mcuboot/boards/thingy91x_nrf9151.conf
@@ -14,3 +14,6 @@ CONFIG_UART_CONSOLE=n
 CONFIG_MCUBOOT_SERIAL=y
 CONFIG_MCUBOOT_SERIAL_DIRECT_IMAGE_UPLOAD=y
 CONFIG_BOOT_SERIAL_IMG_GRP_IMAGE_STATE=y
+
+CONFIG_PM_EXTERNAL_FLASH_MCUBOOT_SECONDARY=y
+CONFIG_PM_OVERRIDE_EXTERNAL_DRIVER_CHECK=y