Disable wordpress editor - gutenberg on Post type post
// Disable wordpress editor - gutenberg on Post type post
add_filter('use_block_editor_for_post_type', 'disable_gutenberg', 10, 2);
function disable_gutenberg($current_status, $post_type)
{
// Use your post type key instead of 'product'
if ($post_type === 'post') return false;
return $current_status;
}