PWAs aren’t exactly great on iOS to begin with, and if that was their aim, it would make more sense to disable it worldwide rather than just the EU. They may well not bring it back for all we know, but if they are going to, it’s not going to be without figuring out exactly what it is they want PWAs to be able to do and what resources they’ll be allowed access to which probably means additional APIs and entitlements for third-party browsers.