Help for show Additional Images in Skroutz XML

add_filter('webexpert_skroutz_xml_custom_gallery','webexpert_skroutz_xml_custom_gallery',10,2);

function webexpert_skroutz_xml_custom_gallery($gallery_image_ids,$product) {
    if ( $product->is_type( 'variation' ) ) {
        $colour=get_post_meta($product->get_id(), 'attribute_pa_'.esc_attr( get_option('we_skroutz_xml_colour')), true);
        if ($colour) {
            $gallery=get_post_meta($product->get_parent_id(),'_product_image_gallery_pa_'.esc_attr( get_option('we_skroutz_xml_colour').'-'.$colour,true));
            if (is_array($gallery)) {
                $gallery=end($gallery);
            }
            $expl=explode(",",$gallery);
            
array_shift($expl);

            return $expl;
        }
        return [];
    }else {
        return $gallery_image_ids;
    }
}

This is a filter of functions.php in hello elementor theme that i need to modify, so the additional images added in the Additional Variation Images Gallery for WooCommerce plugin, could show in the XML of WooCommerce Skroutz & BestPrice XML Feed.