Navigation.swift

class NavigationState: ObservableObject {
    @Published var path = [Route]()
}

enum Route: Hashable {
    case home
    case content
    case details
}

struct AppView: View {
    
    @StateObject private var state = NavigationState()
    
    var body: some View {
        NavigationStack(path: $state.path) {
            Sidebar(state: state)
                .navigationDestination(for: Route.self) { route in
                    RouteView(route: route, state: state)
                }
        }
    }
}

struct RouteView: View {
    
    let route: Route
    @ObservedObject var state: NavigationState
    
    var body: some View {
        switch route {
        case .home:
            Sidebar(state: state)
        case .content:
            ContentView(state: state)
        case .details:
            DetailView()
        }
    }
}

struct Sidebar: View {
    
    @ObservedObject var state: NavigationState
    
    var body: some View {
        List {
            NavigationLink(value: Route.content) {
                Text("Content")
            }
        }
    }
}

struct ContentView: View {
    
    @ObservedObject var state: NavigationState

    var body: some View {
        List {
            ForEach(0...10, id: \.self) { id in
                NavigationLink(value: Route.details) {
                    Text("Detail \(id)")
                }
            }
        }
        .navigationTitle("Content")
    }
}

struct DetailView: View {
    
    var body: some View {
        Text("Detail")
    }
}