activity_on_boarding.xml

<?xml version="1.0" encoding="utf-8"?>
<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:id="@+id/on_boarding_main_container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".OnBoardingActivity">

    <androidx.viewpager2.widget.ViewPager2
        android:id="@+id/on_boarding_view_pager"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <!-- other screen stuff -->
    <!-- ... -->

</androidx.constraintlayout.widget.ConstraintLayout>