React router is taking me to the same page

I have a nav bar that has Home and About links , I’m trying to make a router that goes to About page when I click on about link and goes to home when I click on Home link , but I don’t know why either I click at home or about , It takes me to Home page

this is App.js file :

<Router>
<Box>
<Navbar />
<Home />
<Routes>
<Route exact path="/" component={Home}/>
<Route path="/about" component={AboutUs}/>
</Routes>
</Box>
</Router>

and this is Home.js file :

function Home() {
  return (
    <div>
    <FirstSection />
    <SecondSection />
    <ThirdSection />
    </div>
  )
}

and this is About file :

function AboutUs() {
  return (
    <div>AboutUs</div>
  )
}

and lastly this is the nav bar :

<a href="/">
            <MenuButton>
                Home
            </MenuButton>
            </a>
        </Menu>
        <Menu>
        <a href="/about">
            <MenuButton>
                About us 
            </MenuButton>
            </a>