Is the Swift Xcode 12, New Project, App, Use Core Data code wrong?

Default code

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struct ContentView: View {
    @Environment(\.managedObjectContext) private var viewContext

    @FetchRequest(
        sortDescriptors: [NSSortDescriptor(keyPath: \Item.timestamp, ascending: true)],
        animation: .default)
    private var items: FetchedResults<Item>

    var body: some View {
        List {
            ForEach(items) { item in
                Text("Item at \(item.timestamp!, formatter: itemFormatter)")
            }
            .onDelete(perform: deleteItems)
        }
        .toolbar {
            #if os(iOS)
            EditButton()
            #endif

            Button(action: addItem) {
                Label("Add Item", systemImage: "plus")
            }
        }
    }
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The list is displayed, but what about ".toolbar"? Need a NavigationView?

Added Navigation View

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struct ContentView: View {
    @Environment(\.managedObjectContext) private var viewContext

    @FetchRequest(
        sortDescriptors: [NSSortDescriptor(keyPath: \Item.timestamp, ascending: true)],
        animation: .default)
    private var items: FetchedResults<Item>

    var body: some View {
        NavigationView {
            List {
                ForEach(items) { item in
                    Text("Item at \(item.timestamp!, formatter: itemFormatter)")
                }
                .onDelete(perform: deleteItems)
            }
            .toolbar {
                #if os(iOS)
                EditButton()
                #endif

                Button(action: addItem) {
                    Label("Add Item", systemImage: "plus")
                }
            }
        }
    }
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Is STRUCT not displayed yet? .. ..

Make HStack in the toolbar

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struct ContentView: View {
    @Environment(\.managedObjectContext) private var viewContext

    @FetchRequest(
        sortDescriptors: [NSSortDescriptor(keyPath: \Item.timestamp, ascending: true)],
        animation: .default)
    private var items: FetchedResults<Item>

    var body: some View {
        NavigationView {
            List {
                ForEach(items) { item in
                    Text("Item at \(item.timestamp!, formatter: itemFormatter)")
                }
                .onDelete(perform: deleteItems)
            }
            .toolbar {
                HStack {
                    #if os(iOS)
                    EditButton()
                    #endif

                    Button(action: addItem) {
                        Label("Add Item", systemImage: "plus")
                    }
                }
            }
        }
    }
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