In react-router-dom v6, Switch is replaced by routes Routes.

You need to update the import from:

1
import { Switch, Route } from "react-router-dom";

to:

1
import { Routes, Route } from 'react-router-dom';

You also need to update the Route declaration from:

1
<Route path="/" component={Home} />

to:

1
<Route path='/welcome' element={<Home/>} />