Project Oakdale is in public preview at the time of writing; however, it is a major innovation from Microsoft, and you need to be aware of it. Project Oakdale provides the capability to create data models and canvas apps inside of Microsoft Teams. With Project Oakdale you do not need to create an app and go through the steps to install and share the app; instead, you create an app within a team and all members of the team can access the app.
To use Project Oakdale, you need to click on Apps in the bottom left-hand rail, then search for and select Power Apps. This adds the Power Apps app to the left-hand rail, as shown in the following screenshot:
From this page, you can create tables to store your data and create apps. There are sample apps you can deploy for common business challenges such as inspections and issue reporting.
This ability to combine with Microsoft Teams is not limited to Power Apps...