I found another way to do this:

import { useNavigate } from "react-router-dom";
let navigate = useNavigate();

useEffect(() => {
   if (LoggedIn){
      return navigate("/");
   }
},[LoggedIn]);

https://reactrouter.com/docs/en/v6/getting-started/overview#navigation

I found another way to do this:

import { useNavigate } from "react-router-dom";
let navigate = useNavigate();

useEffect(() => {
   if (LoggedIn){
      return navigate("/");
   }
},[LoggedIn]);

See Overview, Navigation.