AMP friendly in this case likely means a server side javascripts/embed.js such that a script does not need to be pasted into the body of the target page and appended to the head. The current functionality is very dependent on client side processes.
For example, it would solve the problem if I could include a
<iframe src="discourseurl/embed-comments?embed_url=myurl"></iframe>
I got pretty close to this functionality, but none of the links work and I am bypassing your validation.
I did read the post @sam linked before making the suggestion. This seems a lot more reasonable than the entire platform supporting AMP, though I understand the reservations.