if she isnt eating, drinking, pooping and dustbathing its best to take her off the nest every day/two days. I would put the food and water not too near to the nestbox.
She needs to stretch het legs a bit and you don’t want her too mage a huge poop in front of the nest. Best give chick feed...
I prefer to candle at day 7 or 8. These are the best days to see if the embryos grow well.
Its better not disturb the broody to much. That’s why I candle just once.