I really do wish there could be a good old list of professionals who do not follow the year-long RLE session. My personal thing at the moment is I want to be put on antiandrogens to halt my rapid balding, to halt my thickening facial hair, to halt my acne and oil production, and to halt certain build-ups of fat around the stomach and under the chin. I'm right at the age all these second-male-puberty things are happening to me, and men do get put on antiandrogens for all these things; however, it's more common among older men. I personally do want a letter for this because not all medical doctors prescribe antiandrogens for these issues, and I want a letter that basically forces them to; however, tough part is finding a therapist to write a letter that says "hey doctor, do this, my patient needs it", because while antiandrogens aren't specifically part of transitioning per se (in terms of technicalities), I can only make up so many excuses of why a man would want to halt these changes, other than my very young age and acting career.
I mean, a therapist knowing that I'm Trans may make the negative difference between "Sonny, at your age, I don't blame you, I wouldn't want to look decades older than I am either, here's the pills!" and "Sorry miss, Trans have to do the year-long RLE before any hormonal changes can take place." In a year, I'll be completely bald, that's how rapid my hair loss currently is!!!