Problem phenomenon:
This picture is not available in a fully managed device in the Google Photos app.
Solutions:
Please follow the below steps to resolve the issue:
1. Check the available storage.
Need to check the available storage in the Google Photo app. If the required storage is not available then need to upgrade the available storage.
2. Check your backup status.
Open the Google Photos app, tap your profile picture or initials, and look for a message about your backup status.
3. Resolve out-of-sync issues.
Open the Google Photos app, sign in to your Google account, tap your profile picture or initials, and then tap Review out-of-sync changes.