The way you explained it sounds like you open the “Meta app” and inside, you have tabs for each service? And then these services open within the same app? I might be wrong but doesn’t this violate App Guidelines?
Even the Microsoft 365 app shows you Outlook or Teams in the “Apps” section, but launching them from there still opens the individual apps for Outlook or Teams.
The way you explained it sounds like you open the “Meta app” and inside, you have tabs for each service? And then these services open within the same app? I might be wrong but doesn’t this violate App Guidelines?
Even the Microsoft 365 app shows you Outlook or Teams in the “Apps” section, but launching them from there still opens the individual apps for Outlook or Teams.