Hi Michael,
Thank you for contacting Syncfusion support.
We understand that your requirement is to drag and drop the items in the TreeViewAdv which are bind using the data source. If so, we have prepared a simple sample to achieve drag and drop functionality in items of TreeViewAdv which is bind and it can be downloaded from the below location.
Please check with the above sample and let us know if we misunderstood your query.
Regards,
Keerthana J