Je "troll" reactie klopt niet helemaal. Het klopt namelijk eigenlijk wel. Apple bepaald, en men is verplicht om WebKit te gebruiken in Apps.
Op IOS is men verplicht om Apples rendering engine te gebruiken, alle JavaScript komt dus op uit Apple
Chrome for iOS has always been kept separate due to the fact that it relies on the WebKit rendering engine rather than Google’s Blink engine. This is because of Apple’s constraint on browsers on iOS, requiring all of them to run on WebKit.
https://9to5mac.com/2017/01/31/google-chrome-ios-open-source/2.5.6 Apps that browse the web must use the appropriate WebKit framework and WebKit Javascript.
https://developer.apple.com/app-store/review/guidelines/#software-requirements