Techsaw Hi good morning to all I am new to graphene I have two questions if you install play services is it possible that Google can see your message notifications from other apps like signal,proton etc.
No, that's not possible. Google servers access only the name of the app which the push notification is for (Proton, Signal, etc.). It then tells Google Play Services on your phone which then tells Signal or Proton app on your phone to connect to their sever. The contents of the actual notification are then transmitted securely from the Signal or Proton server to your phone.
Techsaw Next question is a seven digit pin code secure enough as a password
Yes, a 6-digit PIN is sufficient but you do rely on Weaver for the rate-limiting. You can read more details here: https://discuss.grapheneos.org/d/4049-security-from-bruteforce/66