Have you checked this thread out?
@chempistry has said the distillate was made thru preparative chromatography from cbdv flower.
Just playing devil’s advocate here, if it’s possible to get it tested for d8thcv, it would be a cross-check as to its natural sourcing. Though I don’t know if it’s possible for it to isomerize in small amounts during preparative chroma, which would invalidate that logic.