Roblox goes out of the way to explicitly support GrapheneOS. They permit GrapheneOS users to join servers enforcing remote attestation to verify the OS and app as a form of anti-cheat. They need to explicitly add the verified boot keys for each non-Google-certified OS. GrapheneOS is currently the only one they're supporting but they're making it clear that it's not at all exclusively available to it.
It would be accurate to call it official support if it means they have set up their app with the privacy-friendly Android Hardware Attestation API on GrapheneOS.
Unless I'm wrong and they just support Basic Play Integrity or a lower one, I don't know much about that. But those would require play services. I could test to see if it works without play services which would indicate they are using the Hardware Attestation API to check the bootloader lock.
Roblox goes out of the way to explicitly support GrapheneOS. They permit GrapheneOS users to join servers enforcing remote attestation to verify the OS and app as a form of anti-cheat. They need to explicitly add the verified boot keys for each non-Google-certified OS. GrapheneOS is currently the only one they're supporting but they're making it clear that it's not at all exclusively available to it.
It would be accurate to call it official support if it means they have set up their app with the privacy-friendly Android Hardware Attestation API on GrapheneOS.
Unless I'm wrong and they just support Basic Play Integrity or a lower one, I don't know much about that. But those would require play services. I could test to see if it works without play services which would indicate they are using the Hardware Attestation API to check the bootloader lock.