^^&&^^

Edit File: product-thumbnails.php

<?php

/**

* Single Product Thumbnails

* This template can be overridden by copying it to yourtheme/woocommerce/single-product/product-thumbnails.php.

* HOWEVER, on occasion WooCommerce will need to update template files and you

* (the theme developer) will need to copy the new files to your theme to

* maintain compatibility. We try to do this as little as possible, but it does

* happen. When this occurs the version of the template file will be bumped and

* the readme will list any important changes.

* @see         https://docs.woocommerce.com/document/template-structure/

* @package     WooCommerce\Templates

* @version     3.5.1

defined( 'ABSPATH' ) || exit;

// Note: `wc_get_gallery_image_html` was added in WC 3.3.2 and did not exist prior. This check protects against theme overrides being used on older versions of WC.

if ( ! function_exists( 'wc_get_gallery_image_html' ) ) {

return;

}

global $product;

$attachment_ids = $product->get_gallery_image_ids();

if ( $attachment_ids && $product->get_image_id() ) {

foreach ( $attachment_ids as $attachment_id ) {

echo apply_filters( 'woocommerce_single_product_image_thumbnail_html', wc_get_gallery_image_html( $attachment_id ), $attachment_id ); // phpcs:disable WordPress.XSS.EscapeOutput.OutputNotEscaped

}