The problem doesn't lie with e/OS/, nor any other alternative. Google locks down capabilities with "Play Integrity", effectively attestation for official Google approved operating systems only. If you aren't on the list you fail the checks, and apps (like banking apps) will fail to run.

But it’s banking apps that opt into that. It’s not like Google is saying you must use Play Integrity. It’s a feature that banking apps are more likely to use. The EU could require banks to make apps for other operating systems.

IIRC EU was the issue?

"EU Age Verification Project Mandates Hardware-Bound Attestation"[1]

[1]: https://www.reddit.com/r/Android/comments/1vds3jm/eu_age_ver...

Someone should get the EU to ban the EU from requiring age verification.