He has nothing to do with Fortnite… you can even ask him.
The he presented (he never worked ok it) as Fortnite is not the same Fortnite released… when Tecent took place and he got fired they started the game from scratch with a new Engine and new design philosophy that lead them to the behemoth that is today.
The Fortnite created after his departure saved the company and even make Epic become to try new things (like the Epic game Store).
Even today that Fortnite that Cliff has nothing to do (he was even against it) is what sustain Epic as company because you know Unreal Engine, Epic Fame Store, etc are not profiting.
It is even contradictory you say he worked on Fortnite because he was fired because he didn’t want to work on Fortnite
I mean the fact Fortnite was a huge success already teels you he had no involvement at all.