[FR] Guideline for sending web push notifications to iOS 16.4 devices with Firbase

I like to use Firebase to send a "hello push" notification to an iPhone running iOS 16.4 which supports the Web Push API.

Key questions are:

- Do we need to be member of the Apple Developer Program for this feature? I guess not, but any advice is appreciated
- Will Firebase forward the web push notification to apple automatically the way it does for Android devices or do we need to setup APNs manually?
- Where to read on how to leverage iOS 16.4 web push support with Firebase?