I don't have kids, but have very close friends with have kids in this age bracket so I hear and talk about it with them often.
My point of view is this is an age where kids are starting to explore their identities and try to figure out where they belong, and this includes gender. I feel a lot of them are actually trying to figure out who and what they are. I also feel a lot of them are doing it for the attention and "revert back" when the novelty wears off. My friend's daughter had a friend who identified as they/them. Okay, if that's how they identify, I'll go along. It was confusing as fuck when she was telling me stories about "them" as an individual and not "them" as a group of friends and I had to stop her every once in a while to ask which it was. Then one day, she started referring to this individual's pronouns as "him" and I had to stop her again to see if I was following correctly. "Oh, he's not 'they/them' anymore. He's back to 'he/him'."
Kids around age also think they know everything. Same friend's daughter has another friend who is a lesbian and she was furious about it because, according to her, you're not supposed to transition right into gay/lesbian, you're
supposed to be bi-sexual first
At the end of the day, I don't really care cause it's doesn't impact my life one bit so it's no skin off my back. But kids with litter boxes is fucking weird haha