It's orthogonal to that. It's about the app being embedded in some other app that handles concerns such as authentication.

From my point of view, PWA is mostly a nothingburger. I mean who needs another way for web sites to spam me with spamifications about the spamifications they'd like to spam me with if only I am so foolish to consent to more spamification? Similarly the service worker approach is like a Rube Goldberg machine for building Rube Goldberg machines. It's like nobody learned from Netscape Netcaster.

Then some stooges for Google go around and say that Apple is ruining the web by not supporting that nonsense when really Apple is just stopping the insanity.