They are cockatiels, Dovie.
I think I would keep trying if only every couple of days. She is getting calcium if she's eating the cuttlebone.
I bet that a week before hatch she will begin to eat soft foods. She knows that she needs to feed soft foods to the babies.
Try peas, corn, finely shredded carrots, cooked sweet potato and mashed whole hard boiled egg, including the whites. Good protein in the whites.
Fruits are unnecessary.
Good luck.
Annie