It does not make business sense for Apple or Google to allow them for obvious reasons. They get money from in app purchases. If every app was a PWA they would lose a lot of revenue.
Even for businesses that are ad supported they are better of with native apps. You can block ads on a PWA very easily because it's a web app. With a mobile app good luck switching the ads off.
Now, I get the technical advantages of a PWA but it seems to me that it has failed to take off because of the business reasons above.
Is my assessment correct?