Hi im also having the same issue on my Apple TV 4k 2021 using emby connect  Emby app provides the pin the pin is confirmed on the web browser on another device then the Emby App on Apple TV stays on the pin provided (showing the pin number) forever, I even waited more than 1h just to see if it was a delay issue. I there any real solution for this ??? I have the latest Emby app from the Apple TV app store.THX