so we can achieve this in react-router V6 by using useLocation click to see doc. . just you need to wrap your own navbar component code with this condition :-
{ location.pathname != '/login' && your navbar code }
1st go to your Navbar.js file :-
import { useLocation } from "react-router-dom";
function MuiNavbar() {
let location = useLocation();
return (
<>
{
location.pathname != '/login' &&
/* now just write your navbar code here */
}
</> )