Nah, it couldn't be
/So, this is what we're being asked to believe: that an autistic kid with OCD who often can't speak on her own has:
organized a worldwide movement
given TED talks, spoken to the UN General Assembly, and been named Person of the Year by Time magazine
managed to get a ride on a multimillion-dollar racing yacht so she wouldn't have to fly (and bragged on how she wasn't releasing CO2 on the trip, although it required seven plane tickets for the crew for the boat)
There's a bucolic barnyard term for that — actually, several, depending on your choice of equine, bovine, or galline.
This isn't a neurologically atypical high school kid arranging this: there are adults, and probably a lot of adults, using her as a front. Some of them are surely her parents, but while they've been reasonably successful in music and the arts, I don't think they have the money that's obviously behind this.
Frankly, that's a tragedy. Instead of getting the treatment she needs, she's become a climate-change muppet.