She is 93 yrs old. Wants to go back to her apartment but my brother gave up her section 8 Housing voucher she did cooperate with this people Social worker etc. because of her life Insurance. He made a deal with all this nursing Homes. She still wants to cook her own food. Her Dr. declared her incompetent but the reality is she totally deteriorated and still ok health wise but not as healthy as she use to be. She like to cook her own food that is why she is very healthy. But I think the monetary incentive that the health professional/social worker etc. gets when placing a patient in Assisted Living /Care Home etc. gets the one month of the amount the facility charges as their commission. The best interest of the patient will not be serve with this kind of practice. that is why my mother is not as healthy as she was because she does not eat her favorite food anymore.
Even not knowing your Mom's physical and mental condition at 93, it is unlikely that any person that age can live independently and still be safe, especially using a stove (boiling water? hot oil?). Hopefully the facility she is now in is decent, and she will remain there. - you still have to keep on top of the nurses and the aides to monitor her care - just a fact. Some are wonderful, others not so great.
I would suggest that you cook some of her favorite foods yourself and bring a covered hot tray once a week (like a Sunday dinner), with paper plates, plastic utensils & cups and a bottle of soda. Most facilities have private room where you can sit and enjoy your home-cooked dinner, or even have a private birthday party.
I did that many times with my Mother and she was delighted whether it was just us or several family members.
Another thing you can do is talk to the doctor in charge of her and find out if she is getting basic multi-vitamins and supplements like Calcium and Vitamin D. That would also improve her energy level. Basically, you have to give it all time for her and you, to adjust. I wish you and your Mom all the best.