There is no official support for Face Liveness in Flutter right now. We recently needed that feature for one of our projects, so we ended up developing it in-house (it was a bit painful). While we haven't implemented unit tests yet, we've thoroughly tested it and tried to be as detailed as possible on how to integrate it into your Flutter app. Hope it helps! If you have any feedback, we'd love to hear it. https://github.com/Webeleven/amplify-ui-flutter-liveness