Here, it is determined that the app doesn’t need to be waken up as the requirement is to just show the user a simple Notification.
Covering up the Skipped Beat in FCM Conceptualization: Distinction between Notification Messages…
Anirban Bhattacharjee

I would probably argue that this is not true. Your app, will have to be started or waken up in order to receive the push notification. The fact that an application activity is not displayed doesn’t mean the app will not be started.

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