Question about modeling, third person character

So can I export the UE4 SK_Mannequin as fbx and model it to another character and then use it for a game? Or the UE team is not allowing us to do that? I guess that because it’s free we should be able to do that right?

another Engine or another Game?
There may be a difference with the license. This is something you should ask on AnswerHub with a Legal tag / dep section if your intention is to utilize it in a different engine.