In the Shoutouts Powerapp, we use transparent rectangles to implement tabbed menus. You can learn more about the Shoutouts PowerApp here, and even watch a video of it in action.
https://toddbaginski.com/blog/shoutouts-powerapp-demo-walkthrough/
In this video I walk through how we use transparent rectangle buttons to affect control state, visibility, and filter items in a gallery and show you how to do it in your own PowerApps.
