ErnestThornhill
I think Graphene has had contact scopes for year(s) and it seems logical to think apple engineers would be combing through all other operating systems to see what features they could borrow and implement.
Is there proof they borrowed it from GrapheneOS? Of course not.
But if you've seen iOS and Android features over the first decade or so of the smartphone wars, it was very clear they copied the best features from each other along the way...