For reference, the app uses this class: https://developer.android.com/reference/android/location/Geocoder
Discussion
Fix this
Can confirm no Geocoder implementation currently exists.
It would require us adding it to the GMSCompat layer that we provide for sandboxing Play Services.
Please add an issue to: https://github.com/GrapheneOS/os-issue-tracker/issues
If this is something you'd like to see provided.