[macos ,swiftui ] How to observe the new notification event?

I want to make a Dock application for my self . So I need to get the running application's badge count , then can show it on the Dock , let user know there has new notifications .

but now , I want to ask ,how swift can observe the new notification event ? I am new at this .

[macos ,swiftui ] How to observe the new notification event?
 
 
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