How to find original email redirect link from landing page for firebase email link sign in option

export default function Home() {

  return (
    <>   
        boilerplate
        <button onClick={bigFunction}>Press me to check if the browser has the email saved</button>
    </>
  )
}
let signinwithemaillink = "https://ticketme.page.link/qbvQ"
function bigFunction()
{
  console.log(window.location.href)
  if (isSignInWithEmailLink(auth, signinwithemaillink)) {
    // Additional state parameters can also be passed via URL.
    // This can be used to continue the user's intended action before triggering
    // the sign-in operation.
    // Get the email if available. This should be available if the user completes
    // the flow on the same device where they started it.
    let email = window.localStorage.getItem('emailForSignIn');
    if (!email) {
      // User opened the link on a different device. To prevent session fixation
      // attacks, ask the user to provide the associated email again. For example:
      email = '[email protected]';
    }
    
    // The client SDK will parse the code from the link for you.
    signInWithEmailLink(auth, email, signinwithemaillink)
      .then((result) => {
        alert("all good")
        console.log(result.user)
        // Clear email from storage.
        window.localStorage.removeItem('emailForSignIn');
        // You can access the new user via result.user
        // Additional user info profile not available via:
        // result.additionalUserInfo.profile == null
        // You can check if the user is new or existing:
        // result.additionalUserInfo.isNewUser
      })
      .catch((error) => {
        console.log(error.code)
        // Some error occurred, you can inspect the code: error.code
        // Common errors could be invalid email and invalid or expired OTPs.
      });
  }  
}