I have the same issue, Xcode 13.2.1. I downloaded Xcode 13.2.1 from developer site, installed along with Xcode 12.5. In Xcode 13.2.1, I can use iOS 11.4, 12.4 , 13.7, 15.2 simulator, however, iOS 14.5 simulator is missing and the components tab is empty...

Yes, suddenly it's just fixed for no reason.