The Gamed 0-day compiles just fine. I can run it on my iPhone with iOS 14.8 and it shows 300 contact information gathered apparently from various sources without me giving any permission at all.
I am on 13.0, perhaps they fixed it because I can't compile on older iOS versions with XCode 13.0 .
PS I was wrong, it works. See the comments above.
maybe they 'fixed' it by not allowing any app of this kind (specific Api call) in the appstore? wouldn't challenge you to try and publish an example app though...