Magisk/app/src/main/res/drawable/sc_extension.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape android:shape="oval">
            <solid android:color="@color/su_request_background"/>
        </shape>
    </item>
    <item>
        <inset
            android:drawable="@drawable/ic_extension"
            android:inset="13dp"/>
    </item>
</layer-list>