Parameter update from NSView (right click in MacOS SwiftUI)

While function calls work as expected in an NSViewRepresentable, I'm unclear why the parameter passed below (to show a SwiftUI popup) does not update after a function call in the NSView. Any tips?

Some View Struct

Code Block swift
@State var showMenu = false
var body: some View {
	 ZStack {
		 RightClickableSwiftUIView(onClick: $showMenu)
		 Image(name)
			 .popover(isPresented: $showMenu, ...)
	 }
}

RightClick.swift

Code Block swift 
import SwiftUI
struct RightClickableSwiftUIView: NSViewRepresentable {
		@Binding var onClick: Bool
		func updateNSView(_ nsView: RightClickableView, context: NSViewRepresentableContext<RightClickableSwiftUIView>) {
		}
		func makeNSView(context: Context) -> RightClickableView {
				RightClickableView(onClick: $onClick)
		}
		class RightClickableView : NSView {
				required init?(coder: NSCoder) {
						fatalError("init(coder:) has not been implemented")
				}
				init(onClick: Binding<Bool>) {
						_onClick = onClick
						super.init(frame: NSRect())
				}
				@Binding var onClick: Bool
				override func mouseDown(with theEvent: NSEvent) {
						print("left mouse")
				}
				override func rightMouseDown(with theEvent: NSEvent) {
						onClick = true
						print("right mouse")
				}
		}
}

This is related to another user's post:
https://developer.apple.com/forums/thread/127921