Building, integrating, or customizing apps and workflows within Microsoft Teams using developer tools and APIs
Hi
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Based on your description, I think you can follow this instruction to fulfill your concern
You can activate the notification rules when the app was submitted in Teams admin portal:
- **Navigate to Notification & Alert > App Submission > configure and active **
About list all the Team custom Apps by Graph or PowerShell, you read the instruction here:
- By GraphAPI: List teamsApp - Microsoft Graph v1.0 | Microsoft Learn
- By PowerShell: Get-AllM365TeamsApps (MicrosoftTeams) | Microsoft Learn
Hope my answer will help you
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