How do Survey123 and Workforce interact? Specifically, how is information passed from a Workforce assignment to a Survey123 survey, and vice versa?
Workforce and Survey123 interact via URL schemes that open the app and pass data on opening. For more information, please look at:
Understanding Survey123's custom URL Scheme
Remotely Invoking ArcGIS Apps DevSummit Demo Theater (slides & video)
Retrieving data ...