In the last 0.9.9.6 the
piklist_get_file_data filter don’t exist?
I have try to use the code

add_filter('piklist_get_file_data', 'my_custom_comment_block', 10, 2);
function my_custom_comment_block($data, $type)
{
     // If not a Meta-box section than bail
  if($type != 'meta-boxes')
  {
    return $data;
  }
 
  // Allow Piklist to read our custom comment block attribute: "Hide for Template", and set it to hide_for_template
  $data['hide_for_template'] = 'Hide for Template';

  return $data;
}

add_filter('piklist_add_part', 'my_hide_for_template', 10, 2);
function my_hide_for_template($data, $type)
{
  global $post;
 
  // If not a meta box than bail
  if($type != 'meta-boxes')
  {
    return $data;
  }
 
  // Check if any page template is set in the comment block
  if (!empty($data['hide_for_template'])) 
  {
    // Get the active page template
    $active_template = pathinfo(get_page_template_slug($post->ID), PATHINFO_FILENAME);
    //valuta se pagina è front page

     if($post->ID !== get_option( 'show_on_front' ) ){
 
        // Change meta-box access to user role: no-role
        $data['role'] = 'no-role'; 
      
    }
  }
  return $data;
}

And it not work; i have serached the filter and i have not found it