For anyone reading this looking for an answer, I can confirm the App is working and the Phone Key feature works as well. App had Network, Nearby Devices and Sensor permissions enabled before logging in and for a first successful unlock Google Play Services with Network Access are required (as well as Nearby Devices for the Key function), but network permission can be taken away after logging in. At the time of writing the log in process can be a bit frustrating as you need to input your password and reload the page many times before being successfully logged in. If you are redirected to the Sign In page you see when first opening the App, after entering your password, wait a few seconds before pressing Sign in again as a successful login takes a bit to redirect you to the real app. I hope this is helpful for someone. If you have any more questions, feel free to ask :)