BrownfieldSwiftUIApp.swift

@main
struct BrownfieldSwiftUIApp: App {
  @UIApplicationDelegateAdaptor var delegate: AppDelegate

    var body: some Scene {
        WindowGroup {
          TabView {
            ContentView()
              .tabItem {
                Label("Home", systemImage: "house")
              }
            ReactNativeView(
              moduleName: "ReactNativeScreen",
              rootViewFactory: delegate.rootViewFactory
            )
              .tabItem {
                Label("Settings", systemImage: "gear")
              }
          }
        }
    }
}