I do not know the UK health system either, but I am part of a highly managed health care program here in the U.S., and although I had to pay for my own surgery, now that it is over, I have been brought into the women's basic health care system, and am being treated very well there. Post Op women share many of the same issues as natal women as far as vaginal care, and even hormone issues. If your friend is relying on the GID/GD crowd, it may be that they too see her current status as that of a natal woman, and if she were to go that route may find what she needs. Vaginal infections are just that. Post menopause hormone issues which we imitate hormonally happen to cis women as well.
As for therapy from a mental health professional, unrealistic expectations of surgery are a fact of life even for the best prepared SRS patient, and those would best be treated with a gender therapist. I have had some major issues even in my recovery where dreams and reality did not travel on the same highway.
Recommend that your friend try the gynecologists practice -- after all a woman who finds she is pregnant does not get an appointment 12 months away from the date of her date.