我认为您可以通过在VStack下添加手动分隔符和ScrollView来解决此问题，这样分隔符将显示在导航栏下方

//
//  testUI.swift
//  DDStore (iOS)
//
//  Created by belal medhat on 19/02/2022.
//

import SwiftUI

struct navTitleBar: View {
    var body: some View {
        NavigationView {
            // main navigationView
            VStack() {
                // vstack to add the divider and under it the scrollview
                Divider()
                ScrollView() {
                    Text("Hello, World!")
                }.navigationBarTitleDisplayMode(.inline).navigationTitle("Title")
            }
        }
    }
}

struct testUI_Previews: PreviewProvider {
    static var previews: some View {
        navTitleBar()
    }
}