Some of them are manual in Daz others are using ComfyUI (AI) to create the motion. Hopefully that answers your questions!
Are the Daz models for sale, would love to see if I can import them to Virtamate?
The Daz models are created by morphing multiple other models together and adding vein maps, materials etc etc. Those are all paid for products that are not allowed to be redistributed, so I can't sell or export those models to anyone, sorry.