Did she get pushed off the nest maybe? One of my broody ditched some at first but I believe she was being shoved off. I just put her back on the right ones every time and also blocked her off eventually and she managed to hatch 4

as long as sheās still sitting on
something and hasnāt totally abandoned them I think you could put her back on them. That was what I did with mine... she hadnāt ran off and ditched them. There were new eggs with hers. But of course if she quits later it might be worse but if she still sitting Iād move her and see if she stays.