How To Fix "apple Push" Errors -

TCP port 5223 must be open for devices to receive notifications.

If you are developing an app and encountering errors, verify these backend and configuration steps: Troubleshooting push notifications - Apple Developer How to Fix "Apple Push" Errors

TCP port 443 is used as a fallback if port 5223 is blocked. TCP port 5223 must be open for devices

Troubleshooting Apple Push Notification Service (APNs) Errors How to Fix "Apple Push" Errors