(Please carefully look into description and making sure you have expertise to check and fix Apple Push Notification issue.)
0). I got a simple project following steps in Ionic Push Doc [url removed, login to view]
2). On ios part, pushing service request seems registered but never return device token for further testing, please see attachment file for viewing console log.
3). Code would be fine(and very simple), I believe. I need someone has expertise to review and check APNS certificates settings and [url removed, login to view] binding, I will give you access.
3.1) Will send you the project zip for testing
final) To one already be familiar with Ionic Push and Apple APNs, it will cost you few, but will be very troublesome if you never do it.