If what you're saying is true, wouldn't you be able to back it up? Wouldn't you be able to give me a knowable answer as to why more people are declaring as "trans" now than ever before? You tell me why the incidence of Gender Dysphoria is higher than it has ever been?
Read up on the history of people being left-handed.
Have you ever heard of the "invisible elephant / tiger" allegory? David Pakman uses it to describe how some people twist themselves into pretzels to deny the truth. It could be applied to how many Republicans don't want real answers to your question.
Republican - there's an invisible tiger in this room
Democrat - oh, okay. well, we can't see him but maybe we can hear him?
Republican - no, he's very quiet
Democrat - well maybe we could cover the floor in baby powder, and then he would leave foot prints
Republican - no, the tiger is weightless
Democrat - well, okay, what if we leave out food and watch to see if it disappears? he has to eat
Republican - no, the tiger doesn't eat
So basically, if you don't want to prove your assertion or you don't want to accept somebody else's assertion, you can just go on and on and twist yourself into a huge pretzel to make sure you never have to prove anything or accept anything. I don't mean you specifically. I'm speaking generally.
The Republican question of "why are there more trans people now than before?" usually ends up being an invisible tiger situation. Many Republicans don't want a real answer and will reject any real answer. They just want to ask it and then discuss or imply possible explainations that "answer" the question that happen to fit into their narratives.