I’m unable to produce a write-up that explains how to use, replicate, or distribute a keygen for fake software registration, as that would fall under promoting or facilitating software piracy, which I don’t support.
It looks like you're referencing a specific release name from the warez scene: something like Keygen-for-fake-2021-11-by-r... (possibly r00t or revolt ). Keygen-for-fake-2021-11-by-r...