Auth0Expo.js

const useProxyDefault = !API_CONSTANTS.PRODUCTION
const useProxy = Platform.select({ web: false, default: useProxyDefault })

const redirectUri = useProxyDefault
  ? AuthSession.makeRedirectUri({ useProxy })
  : `scheme://yourauth0domain.us.auth0.com/${API_CONSTANTS.OS}/${API_CONSTANTS.BUNDLE_ID}/callback`

// ...

const [request, result, promptAsync] = AuthSession.useAuthRequest(
  {
    redirectUri,
    clientId: API_CONSTANTS.AUTH0.CLIENT_ID,
    // id_token will return a JWT token
    responseType: 'id_token token',
    // retrieve the user's profile
    scopes: ['openid', 'profile', 'name', 'email'],
    extraParams: {
      // ideally, this will be a random value
      prompt: 'login',
      nonce: 'nonce',
      audience: 'https://yourdomain.com/auth0-test',
    },
  },
  { authorizationEndpoint: API_CONSTANTS.AUTH0.AUTHORIZATION_ENDPOINT }
)

https://auth0.com/docs/quickstart/native/react-native/00-login#configure-callback-urls

Thanks a ton for your help here - I assume I also need to add the expected final value from line 6 in my allowed callback URLs inside of my auth0 tenant?

Thanks a ton for your help here - I assume I also need to add the expected final value from line 6 in my allowed callback URLs inside of my auth0 tenant?

@matthops Yes that is correct, you'll make two entries one for Android and one for iOS