In Drupal 8 Webform_Civicrm how do I clone a Contact?
Unfortunately there is no such clone feature yet. We've had to park it for now as other outstanding bugs: re: existing contact element, and re: static/live options take precedence.
So I've just removed the Tip (for now) and have added a ToDo statement:
https://github.com/colemanw/webform_civicrm/pull/449