https://www.cnet.com/news/valve-accuses-apple-of-rejecting-steam-link-mobile-streaming-app/

If you were hoping to stream PC games from your powerful gaming rig to your iPhone or iPad, we've got some bad news -- PC gaming giant Valve says Apple has rejected its Steam Link app, meaning it may not appear appear on the App Store after all. (It's available in beta on Android right now.)

Valve says that Apple actually approved the iOS version for release on May 7, but decided to renege -- due to "business conflicts with app guidelines that had allegedly not been realized by the original review team," according to Valve's statement.