As one could expect, leaks and rumors, whether they're true or not, often times inspires people to manufacture leaks of their own for fun. This seems to be such a case where a Ryzen 3 3300X has surfaced on Userbenchmark; the circumstances surrounding this CPU are very peculiar and seem to indicate that this is nothing but a forgery.
https://www.notebookcheck.net/A-mobile-Ryzen-3-3300X-surfaces-but-it-s-almost-certainly-fake.376936.0.html