Notification Content Extension not working in MacOS

I've set up a Notification Content Extension for my app, but it's not getting called(tried both local and remote push). I've read the Apple dev guide, and I've set up everything as it says. https://developer.apple.com/documentation/usernotificationsui/customizing_the_appearance_of_notifications

I've looked over the common issues (setting proper deployment targets and setting category identifiers from the backend and in the .plist)

After receiving the notification, I'm not able to get the expanded view and neither is the didReceive(_ notification: UNNotification) of my extension view controller getting invoked. Is there something I'm missing while doing the extension setup, I m not able to figure out the problem?

Also, I m not able to understand this note from apple

"Notification content app extensions are supported only in iOS apps"

when all the Notification content Extension APIs are provided for MacOS also?

Notification Content Extension not working in MacOS
 
 
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