What kind of parameter is this? { children }: { children: JSX.Element }

This is the function declaration

function RequireAuth({ children }: { children: JSX.Element }) {
  let auth = useAuth();
  let location = useLocation();

  if (!auth.user) {
    return <Navigate to="/login" state={{ from: location }} replace />;
  }

  return children;
}

I know that the function takes JSX component, but I still don't know which syntax the parameter uses.