Saved pass in apple wallet passbook not updating

Hi, I am using DOTNET-Passbook library to generate apple wallet pass, it was successfully generated and saved. Now when I am updating the pass using push notification. Push notification not showing on phone. I have followed the wallet protocol for API creation following this Article

https://developer.apple.com/library/archive/documentation/PassKit/Reference/PassKit_WebService/WebService.html

after the API implementation, I am successfully getting device token and push token from API and I am using Pass Type ID certificate to update pass and sending notification on push token received from API. Following this article for configuration:

https://medium.com/@yangzhoupostbox/part-2-push-notification-for-updating-apple-pass-in-asp-net-6020768d112

Saved pass in apple wallet passbook not updating
 
 
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