You can install our site as a web app on your iOS device by utilizing the Add to Home Screen feature in Safari. Please see this thread for more details on this.
Note: This feature may not be available in some browsers.
I recommend viewing this Google Sheet that people have been using to track the FSD beta rollout:
https://docs.google.com/spreadsheets/d/14PTfmvXrduBV-gRBUm5eh3s-z_nDLlo_uBOFZ2rW2xs/edit?usp=sharing