Exporting from Vam includes the gens graft as part of the base mesh - it ends up being 24,928 verts
You can create a morph in Daz for this as long as you use that vam exported obj instead of Base Gen2 when using morph loader pro within Daz.
Essentially, it stems from this guide:
https://hub.virtamate.com/resources/vam-to-blender-to-vam.3759/
Vam appears to just ignore the additional vert deltas
No idea how the above has ended up at 33k though. All I can assume is someone has grafted something else on somewhere, and its tagged it to the end of the deltas
As a slight aside, Chokaphi's Vam to Daz tool parses a morph and strips out any deltas after 21,556 when it creates the .dsf morph file to use in Daz as those extra's cause issues.