no you need to edit with nintex forms the task form if you want to do so. you can do that by opening the flexi task action and in the ribbon choosing to edit with nintex forms.
It wasn't going to go anywhere so I was going to delete it. I either cannot find that option or it is not available to me so I removed the question from the post in hopes I wouldn't have a bunch of notifications on a post that wasn't going to go anywhere. I failed to avoid that lol.