Hormone therapy for trans kids isn’t reversible it lasts for ever in one form or another.
Yep, I’ve seen a few videos on Youtube of young women with mens voices because they were given testosterone only for them to realize they weren’t men. Here’s one example, mind you this is a female....
https://www.youtube.com/watch?v=Xxhj6nm4pWk&ab_channel=ellepalmer