Thank you for your response and for the helpful insights.
We have determined that the notifications should have been successfully delivered but were not received, based on the following:
Our server received a successful response from APNs when sending the request.
The user confirmed notifications are enabled on their device.
The user triggered the notification three times, and all were reportedly not received.
These points suggest the issue is unlikely due to network problems.
Topic:
App & System Services
SubTopic:
Notifications
Tags: