The list of apps that are available when you create a new message are sourced directly from the “Apps” page in AdMob.
To add an app to Privacy & messaging:
- Complete the steps to add a new app to AdMob. After the app is added, you may need to wait a few minutes for the list to update.
- Add the Google User Messaging Platform SDK to the app.
To remove an app from Privacy & messaging, complete the steps to hide an app from AdMob. This won't remove the app from AdMob, but will hide it from the Privacy & messaging list.