Hi @Fracalzero,
Are you confident that the audience being used contains the user?
In order for the user to become a part of the audience a couple of things, user needs to allow notifications, and needs to be sync'd, hit needs to be sent and processing in analytics.
After you send in the view report are the users, published/failed/blacklisted users?
Also, when installing the app and selecting the allow notifications in a Charles log are you seeing hits sent to Adobe that contains Push Opt-in true?
Jen