Why are some aspects of my book lost on GitHub pages and Colab?

[lmoss]

I have two issues concerning the integration of my book Colab. Everything looks fine locally on my machine, so I feel that some aspects of my set-up have to be off.

First, the MyST admonitions look fine after I first build the book. But when I click 'Open in Colab', the theorems, exercises, tips, don't show up. To see what I mean, look at the bottom of https://colab.research.google.com/github/lmoss/onesharp/blob/main/self_writing.ipynb

Is this a problem that others have faced? I don't see a discussion of it.

And maybe a related other point: I have LaTeX macros done as in https://github.com/orgs/executablebooks/discussions/739

sphinx:
config:
myst_enable_extensions: ["dollarmath", "amsmath", "colon_fence", "deflist"]
mathjax_path: https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js
mathjax3_config:
tex:
macros:
"N": "\mathbb{N}"
"set": ["\left\{#1\right\}", 1]
"semantics": ["[\![#1]\!]", 1]

This all works locally, but none of it works when I view things on Colab.