Guys,
I noticed an odd thing.
In my Location settings -> Use Location is set to 'OFF'.
Secure User Plane Location (SUPL) is set to 'GrapheneOS proxy'
Predicted Satellite Data Service (PSDS) set to 'GrapheneOS proxy'
I experimented with the settings and set both SUPL and PSDS to 'OFF' instead of Graphene servers.
After that I noticed connection attempts to supl.google.com in my NextDNS setup.
My question is why supl.google.com is contacted when the server setting is set to 'OFF' along with the general location services switch set to 'Off' as well?
No user apps are allowed to use location services.
System apps allowed to use the location all the time (default settings no change since GOS install):
Companion Device Manager
ImsService
Shell
System apps allowed when in use (default settings no change since GOS install):
Android Services Library
Bluetooth
Cell Broadcast Service
com.google.android.iwlan
com.google.pixel.iwlan
Network manager
Phone Services
Print Spooler
RcsService
Settings
At some stage I installed sandboxed Google Play Services and Play Store packages from Graphene's App Store but deleted them later without setting anything up.
Cheers!