So I sideloaded the TMobile Play app on my new Chromecast, but it is stuck in portrait mode. There is a full screen button in the video player, but I can't click it using the remote. I think I need to have a cursor to be able to put it in fullscreen, or possibly there's an accessibility feature that would let me scroll through the clickable buttons in the app, similar to the tab button on a computer. I have tried Android TV Remote app and Mouse Toggle for Android TV app, nothing works so far.

Thanks