https://wccftech.com/xbox-app-update-for-ios-brings-xbox-one-game-streaming-to-iphone-and-ipad/

The latest Xbox app update finally brings support for game streaming from Xbox One to iPhone and iPad over a local network or over the Internet. This is similar to PS4 Remote Play app, which also supports game streaming from PlayStation 4 to iOS devices.

Microsoft had been testing game streaming with beta testers for the last few weeks and has finally released the feature for all Xbox One users. At the moment, the app supports game streaming from Xbox One, but it is expected to work with the upcoming Xbox Series X and Xbox Series S once they ship to customers next month.