At the current time, the Survey123 Web Interface has full support to file uploads. It would be nice if this support could be extended to t Survey123 Connect for ArcGIS forms, and Survey123 mobile app.
Web interface that can upload
App interface that can't upload
This has now been implemented with Survey123 version 3.10. See Media—ArcGIS Survey123 | Documentation for more information.
Retrieving data ...