The only thing my T has said is noticing that I got a haircut. I would hate any other type of comment - even a compliment. I am seeing my T about mental issues, not physical appearance. It would make me super self-conscious if she brought up my appearance.

If my T were a man I would be even more offended. And that your T made that comment, I believe, is inexcusable. Throughout history, women have been made to be sex objects. Even in our 'enlightened' Western world, this kind of sexism is still so pervasive it's sickening. Your T was manifesting that sickness, I believe.