TL;DR
- Efforts like Graphene OS face increasing pressure from apps that refuse to run on non-standard Android.
- The custom ROM project characterizes Google’s approach to device attestation as incomplete and flawed.
- Graphene OS is prepared to take legal action if Google won’t let it pass Play Integrity checks.
I suppose you’re talking about a 32-bit app that wasn’t updated for the newer 64-bit architecture. If yes, then there’s actually a technical reason behind it, not just Apple being dicks. Because other than 32-bit apps, every app that received a 64-bit update should still work on the latest iOS.