Having worked on my first PowerApp, I found out that there is a PowerApps for Teams that you start within Teams. I have not subscribed to the Paid Dataverse so I found I can use a version of that in Teams.
The Canvas app within Teams is different as the fields, for example Labels, differ than working on the make.powerapps.com website.
Can you create your Apps on the website, then import them into Teams? Or will the Dataverse table cause issues?