I just change main layout in "Linear Layout" then button showing behind the App bar and inside the TOP bar/ status bar. How to fix this.

code is here

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    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/xmlActivityMain"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/btnOpenAdminAct"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="20dp"
        android:text="openAdminAct" />

    <Button
        android:id="@+id/btn_token"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="token copy"
        />
    <TextView
        android:id="@+id/textView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="212dp"
        android:text="show token or error here"
        android:textSize="20sp"
        />

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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/xmlActivityMain"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:fitsSystemWindows="true" 
    tools:context=".MainActivity">
    
    <!-- Buttons and TextViews go here -->
    
</LinearLayout>