I kind of despise how so much of our current politics and tribalism often prevents what I call the "both of these things can, and likely are, true" hypotheses. Instead you have each side demanding that only their "thing" is true.

In this case, I think it's highly likely that both of these things are true:

1. A society that is much more accepting of trans and other gender identities means that young people who would have previously hidden or suppressed their feelings of gender dysphoria will now seek out help to navigate these feelings.

2. Everyone, especially young people and teenagers, want to feel special and stand out, and while non-traditional gender identities were previously demonized, they can now serve as a way to be special and demand attention in certain societal groups. This, some young people who are going through the confusing feelings of puberty may be much more likely to say they are trans or non-binary, even if this is something they may not feel as strongly about when they reach adulthood.