I have a location service running with background mode capabilities, and according to apple docs the app will call sceneDidEnterBackground() or applicationDidEnterBackground() if the app was launched in the background due to location event or if the app was suspended and received a location event. I am not witnessing this happening.
These methods are only called when the user moves away from the apps.
I am more concerned with the scenario where the app is suspended and gets move to background due to a location event as that is my only point of connection to execute code.