https://www.siliconvalley.com/2019/04/07/netflixs-ios-app-no-longer-works-with-apple-airplay-2/

Netflix users can no longer launch videos or control playback on Apple TVs or other AirPlay-compatible devices from the streamer’s iOS app, a change Netflix says is due to “technical limitations” and not a business disagreement with Apple.

Netflix first added support for Apple’s AirPlay in 2013. AirPlay is Apple’s content-sharing feature that lets users play videos, photos, music and other media from iOS devices on Apple TV and select AirPlay 2-enabled TVs and smart speakers.