Phoenix 1.7 rc is out as well. Perhaps now you can update the LiveView to 0.18 and remove those commented out slots you have in your LiveComponent.
Maybe even try out the gen.auth.live, because It would be awesome if your WebAuthnLiveComponent can play nice with the generated code. 
Also checkout phx_live_storybook! It would be great if the component you make is presentable in that view, because it will eventually get added to Phoenix 1.7 and It would be great to see running components in Storybook mode. As it makes it easy to explore.
Yesterday I searched around the Git repo for the component, unable to find any documentation or example code to run the WebAuthn component.
What’s better than a running live documentation inside Storybook.
