Additional features, settings, or issues not covered by specific Microsoft Teams categories
Dear Sidoti-IT,
Good day!
Thank you for posting to Microsoft Community. We are glad to assist!
Based on your description regarding "Why are we missing the option to install apps using the new app centric management?".
Kindly note that Microsoft changed permission policies, recently Install replaced with Available, When Available set to Everyone it means that Everyone can install this app, including people in my organization, guests, and external users.
To add app on Teams kindly click on three dots or view more apps then enter the name of apps you want to add in your Teams in Search box
However, if you want to edit availability you may achieve it by clicking on Edit availability
I hope the information helps! If there is any question or I misunderstand you, please feel free to let me know. I will continue to assist you. Your understanding and co-operation are highly appreciated. Have a nice day!
Best regards,
Inema |Community Moderator