https://wccftech.com/facebook-gaming-launches-on-ios-without-games-because-of-apples-app-store-policies/

Facebook Gaming has finally launched on Apple's App Store without the ability to play games, something which it supports on Android. The app was stuck in limbo as Apple would not approve it because it went against their policies which does not allow Facebook Gaming to run mini-games within the app. Facebook had to disable instant games in the app while keeping its feature to allow users to discover and watch gaming streams in the app, similar to Twitch.

In a statement to The Verge, Facebook's COO Sheryl Sandberg said: