external_part.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#F44336"
    android:padding="32dp">

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#9C27B0"
        android:padding="32dp">

        <androidx.compose.ui.platform.ComposeView
            android:id="@+id/composeViewInternalPart"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />

    </FrameLayout>
</FrameLayout>