Apple's App Store revenue last year is $64 billion . Enabling 'push notification' will reduce this revenue dramatically, as most of the apps will move to PWA. That is the one reason they are putting this feature on hold.
LakshminathanS
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution