Set up accounts for other apps and channels on Apple TV
Automatically fill in a saved password from your iOS or iPadOS device
On your iOS or iPadOS device, tap the account name field on the sign-in screen for the website or app. Do one of the following: Tap the suggested account. Tap , tap Other Passwords, then tap an account. The password is filled in. To see the password, tap .
Change app settings
To see what other options may be available, go to Settings > Apps on Apple TV , then select the app.