Hey, I'm an aromantic trans guy, and while I'm not ace (I'm bi), I do have a lot of sex repulsion due to dysphoria and trauma. While I personally am hopeful that clitoral growth from T will help alleviate some of my discomfort until a phallo is in the cards, I have to admit that I'm quite afraid that in actuality, it'll make the difference between my junk and a cis guy's more obvious and heighten my distress. So I empathize with your issue, here!
However, I wonder if maybe your perception of the changes are greater than the reality? I ask because after reading endlessly about people's growth, sex drive, etc, my understanding was sort of biased by the intensity of people's emotions. Like, everyone is hype for positive change, yknow, and for most trans guys, increased libido and clitoral size was the desired outcome. But truly, the changes are not great.
If this is the only reason you're opposed to T, I might try it becuase if you did begin to experience sexual side effects you were uncomfortable with, you could stop. Side effects in libido would go away immediately, and any potential growth could be handled surgically via a doctor who specializes in cliteromegaly. I know there are surgeons who consensually reduce clitoris size in cis women. Yes, some of them are intersex, but others were simply unhappy to have been born with a larger clitoris, or have experienced unwanted clitoral growth after athletics-driven steroid abuse.
Unfortunately, I don't think you'll find a reputable surgeon willing to remove the clitoris entirely because, like you said, of the history of female genital mutilation. And I don't know about T and phallo -- although I would like to know, because I also desperately want bottom surgery despite my hesitance re HRT.
(Also: Islam has nothing to do with clitorectomy.)
Hope that helped a little? Good luck, man.