ROMs available: GrapheneOS
If you're on Android 12 and you want to install GrapheneOS, you need to do an update to the June 2022 firmware (do NOT upgrade to Android 13!) and after that do a factory reset.
The phone needs to be connected to the internet after the factory reset for the OEM unlock to be usable.
The June 2022 firmware update is approx. 51.7MB in size.