FWIW, I've had no issue with the Hubitat app and geofencing using Android 10. That sort of phone-specific variation makes it tough to debug.
I've resorted to using @doug's Presence Governor, and determining presence by 4 different inputs:
- Geofencing - Hubitat app
- Geofencing - Alexa app
- Geofencing - Life360
- WiFi - iPhone presence sensor
The arrival threshold is any one of those. The departure threshold is any two.