I noticed I can use it for Nav with WiFi/LTE/Bluetooth all turn off and in airplane mode, but even though I downloaded maps for areas near me, it still requires location to be turned on. Trying to figure what I am missing with downloaded maps for my area for that.
I do have sandboxed Google services running (no account log-in and one will not be created). for push notifications on Signal and Proton Mail. Framework and Google Play state Google is "mirrored", which must do something good.