I would definitely bring it up if it bothers you. Do you feel your weight relates to your therapy? Have you brought it up? Are you happy with your health and your weight? Really for me it’s a health desire rather than a number on the scale desire. I just want to feel healthy and strong in my body. I couldn’t care less if someone thought I was too big or small.
Is your T in good shape? All these facts would determine if her comments would bother me or not. I once had an nurse comment on my weight gain during pregnancy, I still technically had a healthy BMI at 8months along, she was very rude to me about the 5lb gain and yet she was morbidly obese (I have no issue with her weight, just with her giving me rude comments about mine)
Bring it up with your T. If you feel safe with her, she’ll handle it well and you’ll probably feel better for it.