If I understand your question, you are wanting to render the nav and sidebar on the non-login route. For this you can create a layout component that renders them and an outlet for the nested routes.
Example:
import { Outlet } from 'react-router-dom';
const AppLayout = () => (
<>
<NavBar />
<SideBar />
<main className={styles["main--container"]}>
<div className={styles["main--content"]}>
<Outlet /> // <-- nested routes rendered here
</div>
</main>
</>
);
const App = () => {
return (
<>
<Routes>
<Route path="/login" element={<LoginPage />} />
<Route path="/" element={<AppLayout />} >
<Route path="/" element={<Dashboard />} /> // <-- nested routes
</Route>
</Routes>
</>
);
};