How to display 3 photos from an article instead of a thumbnail?

Question

WordPress

Under the article I want to display 5 similar articles with a description. And in them, display not a thumbnail, but 3 photos from each article.
Can you tell me what code can do this?

Answer 1

function get_3_first_attach( $post_ID ) {

  
  $items = get_posts( [
    'post_type'      => 'attachment',
    'posts_per_page' => 3,
    'post_parent'    => $post_ID
  ] );

  return !empty($items) ? $items : false;
}