“We don’t want to punish users of alternative OSes, but there’s really no other option at the moment,” Wilden added before his blunt conclusion. “Play Integrity has absolutely no way to guess whether a given custom OS completely subverts the Android security model.”
Bollocks. GrapheneOS even provides instructions on how to use Android’s hardware attestation API which is supported by every Android device on version 8 or newer.
Hey look, GrapheneOS have explicitly addressed this exact point!