[deleted] Things you might not be aware of:
- Apps can communicate with other each other through mutual consent using IPC.
- There are ways which apps can work out which other apps are installed in the same profile.
- Apps can access your IP address
- Apps can likely work out you are using GrapheneOS and tell the model of your phone
The first two can be mitigated using separate user profiles, if that's something you need. The third one using a VPN to blend in, if that's something you need. The fourth can't really be mitigated.