Hello @dan.schtechel,
Thank you for your inquiry about your Teams app development issue!
We are currently unable to reproduce the issue you’re experiencing.
The Manage apps page is where you allow or block individual apps at the org level. When you block or allow an app on the Manage apps page, that app is blocked or allowed for all users in your organization. When you block or allow an app in a Teams app permission policy, it's blocked or allowed for users who are assigned that policy.
Document Reference: https://docs.microsoft.com/en-us/microsoftteams/teams-app-permission-policies#user-experience