I think it’s probably higher than that if you go younger. It’s pretty hard to quantify something like that, but if you polled a random middle or high school I would imagine that Mr Beast and Taylor Swift are probably the two closest to 100% name recognition. At least with athletes there will be someone that doesn’t know LeBron or Ronaldo or Messi.
I would say with the under-20 crowd Mr Beast is top-5 in name recognition.