Problem is that iOS has bugs, even if feature is available and detected but it does not work in PWA or other webkit browsers… It just silently fails. UA detect

Problem is that iOS has bugs, even if feature is available and detected but it does not work in PWA or other webkit browsers… It just silently fails. UA detection is needed for detecting bug version. For example Wake lock API has been broken from iOS 16.4 that is like over 9 months. Or zindex rendering was flickering between iOS 15.7 to 16.4 Some renderings work in Desktop safari but it is different in mobile safari with same version. It sucks but it is reality of iOS developer experience.