Everything you need to know about AMP is in one very specific section of the spec:

"AMP HTML documents MUST...contain a <script async src="https://cdn.ampproject.org/v0.js"></script> tag inside their head tag" [1]

Meaning, "Your content must load and run some Google controlled javascript, that does who-knows-what to your content and end users".

In the past, that's included injecting a big header that pushes your content down, hijacking swipe events on your page, an [X] button that looked like it would delete the AMP banner header, but instead navigated away from your page back to google, etc.

[1] https://amp.dev/documentation/guides-and-tutorials/learn/spe...