The list of apps that are available when you create a new message in Privacy & messaging is 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.
Note: If you no longer want to use an app in Privacy & messaging, you can hide the app in AdMob. Once you set up an app in AdMob, you can't delete it. Instead, you can remove ad units to ensure your app is no longer monetizing with AdMob.