Delete the iOS app, then install the latest version from Testflight
Log in to iOS. IMPORTANT - log into Windows before logging into iOS (as above) as this will migrate your data and allow the new iOS app to work correctly.
You are now good to play using the Windows app. The Windows app is quite simple at this point so doesn’t provide post-game feedback yet. You can view post-game feedback in iOS by pulling down the dashboard to refresh after a game.
Here is a short video showing the connection and in-game use of the Windows app: