It seems some other TV sets will offer support for AirPlay 2 rather than the TV app. Support for AirPlay 2 will mean you will be able to stream from your iPhone or iPad to watch the Apple content
Ensure your Apple TV or smart TV has AirPlay turned on, and that your iPhone or iPad with HBO Max is connected to the same Wi-Fi network. Visit Business Insider's Tech Reference library for more Apple AirPlay and HomeKit | VIZIO VIZIO with Apple AirPlay 2 & HomeKit. 1. Effortlessly stream, share and mirror your favorite content and personal memories from your iPhone, iPad and Mac. Easily and securely control your TV using the Home app, Siri, or from Control Center on your Apple devices. How to 'AirPlay' Your iPhone to a Roku TV or Roku Nov 28, 2018
Stream from an iPhone to a Samsung TV with AirPlay 2
Airplay: How To Enable and Disable it On iPhone, iPad With AirPlay, you can stream music, photos, and videos to your Apple TV, or stream music to your AirPort Express or AirPlay-enabled speakers. And with AirPlay Mirroring, you can display your iOS screen on your Apple TV. In this post, I’m explaining to you, how to enable and disable AirPlay on your iPhone or iPad. How to cast to smart TVs that support AirPlay 2 | iMore
Jan 17, 2018
How to AirPlay to Apple TV on iPhone, iPad, and Mac | iMore May 10, 2019