如何在分片目标中添加NavHostFragment？

dependencies {
    implementation "androidx.navigation:navigation-fragment-ktx:2.5.3"
    implementation "androidx.navigation:navigation-ui-ktx:2.5.3"
}

<navigation xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/nav_graph"
    app:startDestination="@id/homeFragment">

    <fragment
        android:id="@+id/homeFragment"
        android:name="com.example.app.HomeFragment"
        tools:layout="@layout/fragment_home" />
    <fragment
        android:id="@+id/settingsFragment"
        android:name="com.example.app.SettingsFragment"
        tools:layout="@layout/fragment_settings" />
</navigation>

<androidx.fragment.app.FragmentContainerView
    android:id="@+id/nav_host_fragment"
    android:name="androidx.navigation.fragment.NavHostFragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:navGraph="@navigation/nav_graph"
    app:defaultNavHost="true" />

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val navHostFragment = supportFragmentManager.findFragmentById(R.id.nav_host_fragment) as NavHostFragment
        val navController = navHostFragment.navController
    }
}

plugins {
    id 'androidx.navigation.safeargs.kotlin'
}

<fragment
    android:id="@+id/detailFragment"
    android:name="com.example.app.DetailFragment"
    tools:layout="@layout/fragment_detail">
    <argument
        android:name="itemId"
        app:argType="string" />
</fragment>

val action = HomeFragmentDirections.actionHomeFragmentToDetailFragment(itemId)
navController.navigate(action)