It's to be expected with HRT, but is more than compensated for by the increased sensitivity of other parts of the body, and the ability to have genuine whole-body girl type orgasms.

Cis guys can achieve this if they can avoid ejaculation and continue stimulation. Trust me it's so much better.
You can start with massage oil and nipple play and move on to touch elsewhere on the body. You need the lightest possible touch, just before the point of removing your hand. Relax and take as long as you need, going as slow as possible, and all sorts of sensations will come to the surface. Even better with a partner who is tuned in. Enjoy.

Karen.