Could a doctor implant grafts directly on top of hair that's already miniaturized in order to replace it?

Yes, when doing hair transplantation, transplantation planning is made for the areas of the patient that experience shedding completely or partially. Sometimes, if there is enough space between the existing hair, and the existing hair is strong then transplantation can be done between. If there is existing hair in the planned area, but hair is miniaturized, then that hair is ignored and new hair follicles taken from the donor area are implanted in that area directly. You can also request an evaluation by sharing photos of the front, top, sides and nape of your hair to get a personalized observation.
Prof. Dr. Şule Güngör