Ios SwiftUI工作表不显示导航标题

我在应用程序内部使用工作表，应用程序在所有工作表上都会显示导航标题.但出于某种原因，我没有在页面上看到导航标题，这是从应用程序的第一个视图出现的.我不知道为什么会发生这种事.

我有什么地方做错了吗？

我应用程序中的代码是这样的.内容视图包装在NavigationStack中.内容视图打开另一个视图(Firstview)作为导航目的地，此视图显示一个工作表，我希望在该工作表中显示导航标题和底部栏.我还没有开始在底部栏工作，但我不确定为什么导航标题没有显示.

100

import SwiftUI
import Foundation

struct ContentView: View {
    @State private var showDetails = false
    
    var body: some View {
        NavigationStack {
            VStack {
                Button("First View") {
                    showDetails = true
                }
            }
            .navigationDestination(isPresented: $showDetails) {
                FirstView()
            }
        }
    }
}

struct FirstView: View {
    @State private var showDetails = false
    
    var body: some View {
        VStack {
            Button("Show Sheet") {
                showDetails = true
            }
        }
        .sheet(isPresented: $showDetails) {
            SheetView()
        }
    }
}

struct SheetView: View {
    var body: some View {
        VStack {
            Text(getAttributedText()).font(.body)
            Spacer()
        }
        // .navigationTitle("Settings") // This doesn't work nor does toolbaritem.
        .navigationBarTitleDisplayMode(.inline)
        .toolbar {
            ToolbarItem(placement: .principal) {
                Text("Settings").foregroundStyle(Color.black)
            }
        }
        .interactiveDismissDisabled()
    }
    
    func getAttributedText() -> AttributedString {
        var attributedString = AttributedString("")
        
        var disclaimerText = AttributedString("This is an attributed text with links and underlined text. Some more text just for this sample app.")
        disclaimerText.foregroundColor = .black
        attributedString.append(disclaimerText)


        return attributedString
    }
}