I want to trace below two steps:
Step-1> Is the notification sent from my remote server to APNs.
Step-2> Is the notification recied by iOS from APNs
I want to trace below two steps:
Step-1> Is the notification sent from my remote server to APNs.
Step-2> Is the notification recied by iOS from APNs
APNs, as a service, does not provide either of the things you're looking for.
> Is the notification sent from my remote server to APNs?
You'll have to rely on your server's logs/metrics for this information. If you server is using something that "speaks" the most recent HTTP/2-based APNs protocol, it should be able to report whether each notification was accepted or rejected by the APNs server.
> Is the notification received by iOS from APNs?
As a protocol, APNs has no mechanism for reporting this information.