The Steam Link app by Valve was successfully launched for Android devices earlier in May 2018, and was due to be out for iOS. If you have no idea what the app does, be sure to read our coverage on it here. In any case, in a strange turn of events however, the app has since been revoked despite being approved earlier, due to apparent business conflicts.
According to Valve, it had apparently submitted the app to the App Store on 7 May 2018. On the next day Valve announced that the app would be made available for iOS, before being told by Apple that the permission has been revoked due to said conflict.
Valve has submitted an appeal but to no avail, although it still plans to to try to get permission.