Apple TV 4K aspect ratio

The Zwift app on Apple TV 4K doesn’t work with my projector set up, it only shows a zoomed in portion of the image and edges are severely cropped making it unusable. It is fine if you screen mirror but that is not ideal. I have hear many other discuss this. Every other app (bbc iPlayer, Amazon prime etc) renders fine so it’s not the problem with rest of setup it is a problem with the app. Please could you post a fix? Thanks!