No one should get involved in a medical decision made with the consent of both an adult and their doctor and the only people who should get involved in a medical decision made by a doctor involving a minor is that minor’s parent(s) or guardian(s).
That applies to abortion, gender affirming care, euthanasia or anything other medical procedure.
If the doctor is committing malpractice, that is for the patient to decide. Otherwise, this is (in general) two consenting adults, one of them an expert, making a unanimous decision. The government, your employers, your relatives, your friends, your church, whoever- it’s none of their fucking business.