Geofence Triggered Push Notifications in Unity Android Build

I want to send push notifications to users when user entered in a specific area even if application is not running or device restarted.

I don't know much about neither native android applications nor about andoid studio and grandle - java things.

In my search I found that some people uses firebase for geofence push notifications, but they are native applications.

Android studio can export Unity plugins as .jar or .arr where you can call java - kotlin classes and methods. But I can not figure how to use these and set my locations to these native geofence applications.

Any help would be appreciated.

from Geofence Triggered Push Notifications in Unity Android Build