Do you have a heat pad? (For small pets), I did use one of those once with success with a
Plastic container on top . However the eggs had started developing and the hen stopped being broody. It was an emergency intervention 😂. It worked too.
It likely won’t work, the temp would need to be just right. I don’t see that happening with that method. But you will be able to tell in 4-5 days if you notice veins.