My apple tv only shows airplay. I can't access tv.It wants password for airplay that I don't know. I just want to watch tv

If you see the Conference Room Display box, then that feature may be locked with a PIN code, or may be locked using on-device Restrictions. If you didn’t set it, then someone else in you household did.

If you forget the passcode, disconnect Apple TV from the power outlet, reconnect it, then press and hold the Menu button as it restarts. This temporarily unlocks Conference Room Display mode. For more information, see the Apple Support article Use Conference Room Display mode and related settings on your Apple TV. Once unlocked, you can turn it off in AirPlay Settings.