Wow, that's not usually how asking questions and looking for an honest response works. You are someone with skin in the game and I thought I would ask you your opinion. If you don't know then that is fine, I'm not trying to win. All I have been doing is providing potential issue's have I not?
If a boxer, hits puberty, and starts to develop much higher levels of testosterone than what would be considered normal or average among other females (vast majority of the global population), trains and develops more muscle, speed, and agility than a normal or average female, then at what point is that an unfair advantage being that they are in an extremely small minority at present but taking note of this could lead to certain sports being overwhelmed by females with this condition looking to excel?
To ask questions you kinda need a common playing field. If you keep asking one question with zero way for me to get into why you are asking this I am very unsure how a serious answer could be given. Especially since given your... history, it is very likely your position and I would spark a debate.
Science wise, what you are seeing as a potential scenario is extremely unrealistic. Semenya stands alone in that category for a reason, and her genetic makeup likely has other qualities beyond an higher testosterone level. But even if someone has similar levels, a woman doesn't naturally process that much testosterone. You need some, obviously, as men need estrogen, but it's not a guarantee to translate into advantages you would see in men at all.
The concern with people like me, who have medically transitioned and everything, isn't our testosterone levels, considering it's heavily supressed and about average at best for a woman. It's that we went through "male puberty" - the real effects of this not being that clear deep in transition but whatever - and such we get the standard "male" advantages in bone density, explosive power, yada yada. But a woman, even if she produces more testosterone around puberty, is very unlikely to process this given the lack of male gonads. Again, Semenya is an unique case there, nowhere near the possibility of a norm being established by her inclusion.
Could a woman still has some advantage though? Well... possibly. But the problem is that every body is different and used to its hormonal production that works for it. At the elite sports, only the best genetics win, it's just what happens. Take bouldering. Janja Garnbret will always have an advantage over someone like Ai Mori because the latter is small and nowhere near as strong. As far as women go, Janja is insanely strong and it shows in her pulls and ability to climb outdoor routes no other woman has come close to doing. It's a significant advantage in the sport. You don't really need to check her testosterone level though, and it's a bit odd that women have to subject themselves to this to satisfy invasive scrutiny. She just has better genetics.
(All of this doesn't include taking testosterone supplements though, as the goal of those is to alter the body and push it in a different direction. Even for women it would be a noted advantage that is blatantly doping.)
So when it comes to boxing... you'd need a woman like Semenya to
maybe make the difference you are thinking could happen. But if you are thinking this is going to make woman boxing more unequal, it already is. Marie-Ève Dicaire literally killed a teenager because of what happened in the ring a few years ago. Both were cis women well within the standard expectations of what one would be. But promoters do what they do and medical conditions were hidden so the fight could proceed. I'm all for more scrutiny in combat sports - or frankly, an all-out ban - but your scenario is not exactly the most likely to happen, as plenty of other issues have been exposed before it.
