The current status of PWA push notifications on Discourse is unclear. VincentAlse inquired about the functionality on Android and iOS, citing mixed search results.
For iOS, merefield reported that iOS 15 does not support web notifications, including PWAs. Apple’s plans are not publicly available. As an alternative, merefield recommended using the Discourse Hub app, which facilitates notifications on iOS.
Regarding Android, VincentAlse reported issues with receiving notifications on an Android PWA Discourse app. However, Falco clarified that users need to enable notifications by visiting their profile and clicking the “Live Notifications” button while on the phone.
iOS 15 doesn’t seem to bring us web notifications, sadly. PWA’s are no different to web pages in that regard. I don’t believe Apple publish plans? You’d need to take it up with them.
For iOS at least, recommend you use the Discourse Hub app which is excellent and serves as a useful summary aggregation layer for all your Discourse communities as well as facilitating notifications on iOS.