Loop through all featured products first & non featured products afterwards

I have written some code which displays all of the featured products alphabetically when the sorting option is set to “Sort by Featured”. I would like to be able to add a query onto the end of this so that instead of exclusively showing featured products, it would also have a loop to iterate and display non featured products afterwards. How could i make this work?

// Create sorting option
add_filter( 'woocommerce_catalog_orderby', 'website_catalog_orderby' );
function website_catalog_orderby( $orderby ) {
    $orderby['featured'] = __('Sort by Featured', 'woocommerce');

    return $orderby;
}

// Loop through all featured products
add_action( 'woocommerce_product_query', 'website_product_query' );
function website_product_query( $q ) {
    if ( ! is_admin() && isset($_GET['orderby']) && 'featured' === esc_attr($_GET['orderby']) ) {
        $tax_query = $q->get('tax_query');
        $tax_query[] = array(
            'taxonomy' => 'product_visibility',
            'field'    => 'name',
            'terms'    => 'featured',
        );
        $q->set( 'tax_query', $tax_query );
        $q->set( 'orderby', 'title' );
        $q->set( 'order', 'ASC' ); // A-Z
    }
}

Many Thanks.