Extended FAB using Material Components on Android

layout_with_fab.xml

<?xml version="1.0" encoding="utf-8"?><!--
 ~ Use Extended FAB on Android even if Material Components doesn't support it yet
 ~ See https://github.com/material-components/material-components-android/issues/79
 ~
 ~ Created by Simone Sestito
 -->
<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <!-- Change this view with your content -->
    <View
        android:id="@+id/fragmentContent"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <com.google.android.material.bottomappbar.BottomAppBar
        android:id="@+id/bottomAppBar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_alignParentBottom="true"
        android:elevation="4dp"
        app:layout_anchor="@+id/fragmentContent"
        app:layout_anchorGravity="bottom|center" />

    <!-- It will NOT work without the style applied -->
    <com.google.android.material.button.MaterialButton
        android:id="@+id/fab"
        style="@style/Widget.MaterialComponents.Button.TextButton.IconButton"
        android:layout_width="wrap_content"
        android:layout_height="64dp"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="24dp"
        android:elevation="6dp"
        android:paddingStart="20dp"
        android:paddingEnd="20dp"
        android:text="@string/fab_text"
        android:textAllCaps="true"
        android:textColor="@android:color/white"
        android:textSize="14sp"
        app:backgroundTint="?attr/colorAccent"
        app:cornerRadius="32dp"
        app:icon="@drawable/ic_fab"
        app:iconPadding="12dp"
        app:iconSize="24dp"
        app:iconTint="@android:color/white"
        app:layout_anchor="@+id/bottomAppBar"
        app:layout_anchorGravity="top|center" />

</androidx.coordinatorlayout.widget.CoordinatorLayout>

I think style="@style/Widget.MaterialComponents.Button.TextButton.IconButton"
has changed to
style="@style/Widget.MaterialComponents.Button.TextButton.Icon"