I was a manager at one of these companies and my L5s were making half of what this thing says. Don't trust everything you read on the internet.
This is the biggest difference between now and 15-20 years ago. Before it used to be a secret but now everyone shares the data.
I'm L5 and I earn 400k+ (I joined last year), the compensation on levels.fyi also lines up accurately to my company's compensation data group (in which individuals anonymously report their salary).
These compensations are also accurate to those reported on Blind (anonymous work discussion app) by hundreds of individuals.
I have many co-workers and friends, and know the soft max paybands of each level. The comp reported on levels.fyi is very accurate.