Sounds like she's being a good girl.
I dump my broodies in the communal pens off the nest once a day when I feed, however, those in the isolation pen have food and water a foot in front of them so I leave them be.
I'm tempted right now to put the blue cross hen in the isolation pen with some dummy eggs to see if she'll sit since she goes broody easy.
The lightest and darkest pullets you got from me are her daughters. Can only only hope they got some of her broody traits.
appears so she is being diligent about keeping them warm but got up to eat have some outdoor roll we bought the guys go after the ones I make so broke another up for the 4 she was in the middle with the others munching but then back to her nest