You have the keyboard input up and it doesn't work? You see the text on your phone, but it doesn't appear on the ATV? Never seen that one.

Yes! It doesn’t work at all. This is, as I wrote, that the YouTube app on Apple TV has a custom keyboard on-screen input without any way to put actual focus on the text/password field to trigger the Remote app on the iPhone to enable input such as pasting anything.

For example: https://discussions.apple.com/thread/254761316?sortBy=rank