Export product images by WooCommerce additional variation images - WebToffee Product Import Export for WooCommerce

functions.php

function webtoffee_export_additional_product_variation_images($row = array(), $pid = '', $header_row = array()) {

    $key = array_search('"meta:woo_variation_gallery_images"', $header_row);

    if (isset($row[$key]) && !empty($row[$key])) {
        $attachment_ids = json_decode($row[$key]);
        foreach ($attachment_ids as $id) {
            $attached_file_url[] = wp_get_attachment_url($id);
        }
        $row[$key] = implode(',', $attached_file_url);
    }
    return $row;
}

add_filter('hf_alter_product_export_csv_data', 'webtoffee_export_additional_product_variation_images', 10, 3);