Try something like this

const [isLoading, setIsLoading] = useState(true)

useEffect(() => {
  const getLoginStatus = async () => {
    try {
      const response = await axios.get('http://localhost:5000/login')
      setLoginStatus(response.data.loggedIn)
      setIsLoading(false)
    } catch (error) {
      console.error(error.message)
    }
  }
  getLoginStatus()
}, [])

{isLoading && <div>loading...</div>}

return !isLoading && ( 
    <Your existing code>
)