We strongly oppose the Unified Attestation initiative and call for app developers supporting privacy, security and freedom on mobile to avoid it. Companies selling phones should not be deciding which operating systems people are allowed to use for apps.

https://uattest.net/

Unified Attestation

Unified Attestation is a free, open-source alternative to Google Play Integrity with offline verification and simple app + server integration.

Google's Play Integrity API is a horrible system enforcing using devices officially licensing Google Mobile Services. It permits those regardless of how many years behind they are on security patches. The solution to this isn't another anti-competitive system based in Europe.
Play Integrity API should be regulated out of existence rather than making another system where companies permit their own products while disallowing others. It shouldn't be legal when Google does it and it shouldn't be legal when Volla and Murena do it either. This is wrong.

@GrapheneOS people who are buying these phone execute a form of digital self-imprisoning.

Why are these walled gardens so attractive?