Do you know any kids? I haven't seen anyone filming a dance to upload, but I've seen kids mimicking fortnite dances just for the hell of it. They were gen alpha though.
I mean they were like years ago when it was new and it's just a thing that we're going to drag that generation for just like we're still getting flogged for avocado toast.
Maybe you just don't live anywhere cool enough, I've definitely seen people filming TikTok dances in my city. One time they were even in the parking lot of my apartment complex.