HN user
My guess is: DMA asks Apple to allow other browser vendors have the same access as Safari has.
Probably APIs for adding sites to the Home Screen slipped in the development time and is coming later
That's why I'm against it: Whenever I look at my dad's computer or phone, he has a lot of spam notifications from I don't know where. It's even an avenue for scam, as there are the multiple "Your device is infected" notifications...
I'm not against web tech being able to send notifications, but allowing every site to ask for permission (when people just don't read and click anything) is a nightmare. Apple's solution there is pretty good: You can have web push if you want to treat this site as an app