Custom post type hierarchical loop in Homepage

From the look of your code, all you are doing is creating a nested list. If so, the easiest thing would be wp_list_pages.

$args = array(
    'post_type'    => 'cliente',
    'post_status'  => 'publish',
    'author' => $idutente, // must be comma separated list of IDs
);
wp_list_pages($args);

wp_list_pages only seems to work with 'hierarchical' => true,, but you have registered your CPT with that argument.

You should be able to style it with CSS however you want.

If you need something more complicated, you may need a custom Walker, something like this:

class My_Page_Walker extends Walker_Page {
  function end_el( &$output, $page, $depth = 0, $args = array() ) {
    $link = get_edit_post_link($page->ID);
    $link = '<a class="post-edit-link" href="' . $link . '">Edit</a>';
    $output .= ' ('.$link.') </li>';
  }
}

$args = array(
  'post_type'=>'cliente',
  'post_status'=> 'publish',
  'walker' => new My_Page_Walker
);
wp_list_pages( $args );