Main activity layout:

    <androidx.fragment.app.FragmentContainerView
        android:id="@+id/nav_host_fragment_container"
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".ui.main.MainActivity"
        android:name="androidx.navigation.fragment.NavHostFragment"
        app:defaultNavHost="true"
        app:navGraph="@navigation/nav_graph" />

Nav_grav:

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

        <fragment
            android:id="@+id/loginFragment"
            android:name="com.retroroots.vila.ui.login.LoginFragment"
            android:label="fragment_login"
            tools:layout="@layout/fragment_login" >

            <action
                android:id="@+id/action_loginFragment_to_homeContainerFragment"
                app:destination="@id/homeContainerFragment"
                app:popUpTo="@id/loginFragment"
                app:popUpToInclusive="true"/>
        </fragment>
        <fragment
            android:id="@+id/homeContainerFragment"
            android:name="com.retroroots.vila.ui.Home.HomeContainerFragment"
            android:label="fragment_home_container"
            tools:layout="@layout/fragment_home_container" />
    </navigation>

Login fragment layout:

    <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@drawable/app_background"
        android:paddingTop="100dp"
        tools:context=".ui.login.LoginFragment"
        android:animateLayoutChanges="true">

        <com.google.android.material.button.MaterialButton
            android:id="@+id/loginBtn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>

    </androidx.constraintlayout.widget.ConstraintLayout>

The above button runs this from the login fragment:

    NavDirections navDirections = LoginFragmentDirections.actionLoginFragmentToHomeContainerFragment();

                    NavHostFragment.findNavController(currentFragment).navigate(navDirections);

Home Fragment layout:

    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        tools:context=".ui.Home.HomeContainerFragment"
        android:orientation="vertical"
        android:id="@+id/homeLayout">

        <com.google.android.material.bottomnavigation.BottomNavigationView
            android:id="@+id/bottomNavVw"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:menu="@menu/home_top_nav_menu" />

        <androidx.fragment.app.FragmentContainerView
            android:id="@+id/homeNavHostFragmentContainer"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:name="androidx.navigation.fragment.NavHostFragment"
            android:padding="10dp"
            app:navGraph="@navigation/home_nav_graph"/>

    </LinearLayout>

This runs from the home's fragment "onViewCreated":

    BottomNavigationView bottomNavigationView = view.findViewById(R.id.bottomNavVw);

            NavController navController = NavHostFragment.findNavController(this);

            NavigationUI.setupWithNavController(bottomNavigationView, navController);

Menu home:

    <menu xmlns:android="http://schemas.android.com/apk/res/android">
        <item
            android:id="@+id/pendingOrdersFragment"
            android:title="@string/pendingOrdersTabTxt" />

        <item
            android:id="@+id/historyFragment"
            android:title="@string/historyTabTxt" />

    </menu>

pendingOrdersFragment & historyFragment layout: Just a single text view with the name of the fragment

Home nav graph:

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

        <fragment
            android:id="@+id/pendingOrdersFragment"
            android:name="com.retroroots.vila.ui.Home.pending.PendingOrdersFragment"
            android:label="fragment_pending_orders"
            tools:layout="@layout/fragment_pending_orders" />
        <fragment
            android:id="@+id/historyFragment"
            android:name="com.retroroots.vila.ui.Home.history.HistoryFragment"
            android:label="fragment_history"
            tools:layout="@layout/fragment_history" />
    </navigation>