SwiftUI Multidestination NavigationLink

ContentView.swift

// Edited by me. Cos I need custom back button
// Origin https://www.hackingwithswift.com/articles/216/complete-guide-to-navigationview-in-swiftui
// Adult router https://functionalgibberish.com/2020-06-03-RoutingInSwiftUI/

enum NavigationTag {
    case Second
    case Third
}

struct ContentView: View {
    @State private var selection: NavigationTag?

    var body: some View {
        NavigationView {
            VStack {
                NavigationLink(destination: Text("Second View"),
                               tag: NavigationTag.Second,
                               selection: $selection) { EmptyView() }

                NavigationLink(destination: ThirdView(route: $selection),
                               tag: NavigationTag.Third,
                               selection: $selection) { EmptyView() }

                Button("Tap to show second") {
                    self.selection = NavigationTag.Second
                }
                Button("Tap to show third") {
                    self.selection = NavigationTag.Third
                }
            }
            .navigationTitle("Navigation")
        }
    }
}

struct ThirdView: View {
    @Binding var route: NavigationTag?

    var body: some View {
        VStack {
            Text("Second View")

            Button(action: {
                route = nil
            }, label: {
                Text("Back")
            })
        }
    }
}