The problem with broodies they tend to add eggs. If this happened it may not be late and hatch later. If it were me I would not help at this point. Has it pipped externally?Can anyone help? I posted in the incubating forum. Don't know if it's malpositioned, etc.
https://www.backyardchickens.com/threads/help-or-not-day-23-on-hatching-egg.1263800/