Custom loop for latest images

I need to create a custom loop that grabs like the 10 latest images from subfolders.

I’ve played a little with the shortcode code but my skills are limited.

For now i have this loop which grabs the featured image of all subfolders:

<?php
$args = array (
	'post_type'      => 'galleryfolder',
	'posts_per_page' => -1,
	'post_parent'    => $post->ID
	);

   $children = new WP_Query($args);

   if($children->have_posts()){
   while($children->have_posts()){
   $children->the_post();?>

   <?php the_post_thumbnail();?>

<?php }
     wp_reset_postdata();
} ?>

Any help on how to make it grab the latest 10 gallery images of all subfolders?
Thanks

https://www.ads-software.com/plugins/eazyest-gallery/