Good evening,
Sorry for the late response, it doesn't look like it would be a matter of concern but there maybe several underlying factors responsible for bleeding gums including a
vitamin c deficiency. It would be better if she visits a dentist as a clinical examination is important to eliminate things that can't be seen clearly on the images. Also a routine cleaning would be recommended to get rid of the plaque and calculus to enhance the general oral health care.
Have a biting fit day!