Since 2016 I've had the option for users to enable push notifications, with a big red disclaimer if the user is using iOS that it does not work on an iPhone. Still, I got so so many requests from user saying they had tried with Chrome(or whatever other browser) instead, and it's still not working, not understanding that all browsers on iOS is limited in the same way because of apple.
If there are any more problems with web push on iOS I'll clearly tell the user that Apple doesn't allow the user to use it, and that they will have to ask apple to enable it, and give them contact information. If the user bought the phone expecting web push to work then they can probably return it and buy an Android phone instead if the seller can't fix web push.