I suffered from carpal tunnel in my right hand for awhile, for which I wore a wrist brace at night, but it hasn't bothered me lately (*knock on wood*). It never occurred to me that testosterone (which I've been on since 2014) could be a factor. Nor did the doctor who diagnosed me suggest this, though he worked in a trans-friendly practice and knew I was a transmasculine person on T. Hmm...

In any case, best of luck with your ailment, which sounds quite horrible to deal with. Glad voice typing is helping; I've also found Google voice recognition (on a Pixel 6 Pro in my case) to be excellent.