Use this:

<com.google.android.material.button.MaterialButton
        android:id="@+id/button"
        style="@style/Widget.Material3.Button.IconButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|end"
        android:layout_marginEnd="96dp"
        android:layout_marginBottom="16dp"
        android:padding="0dp"
        app:icon="@drawable/ic_test_tint"
        app:iconSize="48dp" />

Looks like your design's primary color is yellow, why not make it be your theme's primary color?