I’m new to SwiftUI. I know the hstack is the horizontal layout , but why it show vertical in this case ?

 @SceneBuilder
    private func menuBarExtra() -> some Scene {
        
        if #available(macOS 13.0, *)  {

            MenuBarExtra(isInserted: $statusMenu){
                AppMenu()
            } label: {
                let image: NSImage = {
                    let ratio = $0.size.height / $0.size.width
                    $0.size.height = 18
                    $0.size.width = 18 / ratio
                    return $0
                }(NSImage(named: "Finder")!)
                
                Image(nsImage: image)
            }
        }
        

   struct AppMenu: View {
    
      var body: some View {
         HStack{
                Text("1")
                Text("2")
                Text("3")
            }
       }
    }

Macos Menu bar application :
enter image description here

How can i customize layout in MenuBarExtra ?

How can i customize layout in MenuBarExtra ?