I’ve seen this in some games, where a player has a character but doesn’t have a nickname on it like everyone else does. Or the nickname is just blurred. What kind of witchcraft is this? How do I hide my nickname too?

By the way, if the guy is cheating, how do I report him?
I saw this on Roblox, Fortnite, Free Fire and another game I don’t remember now.
Could this be some kind of privilege for someone who paid for VIP or is like a game admin? Even then, it should be possible to report the person, right?