Few starter answer....
Is the pin on the app on your phone in the correct place? - Yes
Can you recive messages from your hub (could use built-in notification app to test)? Yes
Have you disabled app optimisation and battery optimisation on your phone? Yes, turned off adaptive battery, not sure where app optimization would be turned off (android Pixel3a)
Have you allowed all the app permissions on your phone? Location permission is set to "All the Time". Physical Activity access is allowed. Any other permissions required?
When the app is up, I wander in and out of the Geofence and it gives me a notification on the phone on exit and on entry. I can't find a corresponding log in the logs on the Hubitat itself but I'm not completely sure I know where to look.