SwiftUI - How to use onCommand with NSMenuItem on macOS

Question

I am trying to find the best solution to connect a NSMenuItem with SwiftUI onCommand on macOS.

Currently I an doing the following:

1. In AppDelegate I create a dummy function to be able to list the function First Responder received actions list.

@IBAction func changeColor(_ sender: Any) {
    print("Dummy Function")
}

2. Create and connect a NSMenuItem with the First Responder function in the Main.storyboard.

3. Add the required code to my SwiftUI view

struct TestView: View {

    let changeColor = #selector(AppDelegate.changeColor(_:))

    var body: some View {
        VStack {
            TextField("Text", text: .constant(""))
            Text("Hello World!")
        }
        .frame(maxWidth: .infinity, maxHeight: .infinity)
        .onCommand(changeColor) {
            print("Change Color Action")
        }
    }
}

If the TextField was First Responder before I will see that "Change Color Action" is printed. The View will not become First Responder if the TextField was not First Responder before. Maybe this is currently a bug in Catalina Beta (19A558d) since I don't get focusable to work as well.