T boosts mood, energy, and can help alleviate lack of libido. There is some indication it can boost brain function.

I’m on 0.05 estrodial patch and 100mg of progesterone- just spoke to my Dr about upping doses and adding T- been feeling really depressed lately and not sleeping well.

OP what kind of improvements have you noticed with adding T to your regimen? Why did you start?

For goodness sake, talk to your doctor.

If you are on HRT + testosterone, what are your dosages. I recently added testosterone and it has made a huge difference. I would like to bump up a bit.

For me, currently:
.05 estradiol patch
100 mg progesterone daily
.05 mg testosterone 3x/week.