An update to the Desktop Connector as made available on August 11, 2020. Here is the relevant Autodesk document.
If you’re a Sheet Set user who also uses BIM 360, this update is for you. In addition to other resolved issues, the main feature in this update is that Sheet Set DST files are now recognized. When a DST file is uploaded via the Desktop Connector, any drawings contained therein and their references are all uploaded. When a DST is opened in AutoCAD, drawings will be synchronized locally.