output woocommerce gallery images. (inside product builder inside a code block)

code-block.php

<?php

  	global $product;

	$image_size = 'medium'; /* Image size */

	$attachment_ids = $product->get_gallery_image_ids();

	foreach( $attachment_ids as $attachment_id ) {
  
        	$image_url = wp_get_attachment_image_src( $attachment_id, $image_size )[0];

      		echo '<img src="' . $image_url . '" class="cell">';  /* Needs cell class to be used inside carousel */
      
	}

?>