Other tvOS 12 features
Some TV providers support zero sign-on, which automatically signs you in to your provider account. See Set up single sign-on on Apple TV.
If you’ve saved passwords on your iOS device with iOS 12 or later, you can autofill account passwords on Apple TV. See Set up accounts for other content providers on Apple TV.
Once you connect Apple TV to your iPhone or iPad, Apple TV controls are automatically activated in Control Centre on your iOS device. See Use Control Centre on your iOS device with Apple TV.
You can control Apple TV with some home-control systems set up using the Home app on an iOS device. See Use other remotes to control Apple TV.