If you're doing it for sports, it's possible? If not, then I don't think you have to worry because they won't check it.
However, even if it did show up, why would it matter(just curious)?
I mean, if you're on T then you're obviously presenting as male. If you're presenting as male, there are numerous guys that take Testosterone injections as per doctor's orders due to a low T count... and regardless of whether or not they find out, you have a prescription for it which means they can't do jack about it.