[ajvpot]

Uber, Google Maps, VoLTE, VoWiFi, and eSIM work. You may need to install the sandboxed Google Play Services from the Apps app.

Android Auto is completely disabled as an opinionated security measure.

Google Pay and some banking apps (ones that require Google's Play Integrity API) will not run. GrapheneOS doesn't attempt to spoof these APIs because they are moving towards cryptographic verification [0]. Most apps don't require this check but if they do you are out of luck unless you can get the app developers to trust GrapheneOS's keys.

[0]: https://grapheneos.org/articles/attestation-compatibility-gu...

[mbananasynergy]

Note that Android Auto has been supported in GrapheneOS for a while:

https://grapheneos.org/usage#android-auto

[fifteen1506]

Ya kept wanting to try Android Auto but when they released I failed to find the toggle xD

Nowadays it's the Google's Find My Tag network which will be unsupported.