To be clear you absolutely cannot run Xbox games in a web browser. The service you’re talking about is just streaming video from a remote Xbox to the phone. Yo

To be clear you absolutely cannot run Xbox games in a web browser. The service you’re talking about is just streaming video from a remote Xbox to the phone. You and the OP are both right about fullscreen. There is a web fullscreen API, which Apple does not support. However, PWAs strip out the browser UI so you’re effectively fullscreen. Though you can’t do anything about the status bar, nor can you lock screen orientation. But more to the original point, none of this has anything to do with security. Apple disallowed a native Xbox streaming app because they demanded a cut of the revenue and MS wasn’t willing to give it.