Hello team,
I am trying beta version of DuckDuckGo's App Tracking Protection. As I see my apps are sending user data at Google at start.

I use firebase and admob latest version.
Do you have any idea what do I have to disable in order to prevent this background procedure.
I am reading these:
Unlinking your apps from Firebase disables user metrics and AdMob loses access to all previously collected user metrics data. Complete these steps to unlink your apps from Firebase.
support.google.com
firebase.google.com
But I am not sure if any of these will prevent background Google contact.
Thank you for your time