Managing Wix Groups media/files uploads with Velo backend tools

This is a follow-up or re-statement of a previous question about managing Wix Groups media and file uploads with Velo backend tools.

Need to know more about how media and files uploaded by users in Wix Groups can be managed in the backend. The files/media are saved to the Media Manager root folder, but I do not see that the meta-information that identifies their connection to a Wix Group is exposed in the Media Manager or in the media manager APIs. If the files are moved to trash in Media Manager, they still remain in the Wix Groups posts where they were attached/uploaded and in the Media and Files tabs in Wix Groups. Are there any methods for managing these in the backend with Velo?

Thank you for any observations from sites that use Wix Groups.