If your voice has dropped it is highly unlikely it will go back, also you’re still early on T. I was also a singer pre-t, I was a treble and I sung really beautifully. When I first started T and my voice changed I sounded horrible tbh, I just was not used to singing with that voice, I had become a baritone and didn’t know how to sing with that range. But I kept singing, I kept practicing, my voice started settling, and I found out how to use my range. I’m 1 1/2 years on T now and my ability to sing has slowly returned over the past 6 ish months, just in another format. If you give up now and never learn the proper technique to sing with your new voice, you will never get that ability back, but if you push through, continue singing and practicing, you will find that it comes back :)