That could be done, in theory. We don't have that attribute at any time, ever, though. As Phil mentioned, Rockwell does not make this attribute available in any documented way.
edit: ah I think I see which comment you're responding to. Yes - speaking strictly in OPC UA terms, the OPC UA Description attribute could be mapped the Ignition Documentation tag property at drag and drop time, and only if doing it via drag and drop. That may happen once there's some kind of system.opcua.readAttribute function, but probably not before it, because there being no story at all about how to update that attribute value doesn't really work.