Help making synthetic face data for a markerless mocap system

Microsoft made a facial marker tracking system a few years ago and i’d like to try recreating it. I need to make synthetic face data. What would be the best way to go about this?

I have a base mesh and could make another one, perhaps low poly to start with. My thoughts are to sculpt a closed mouth and open mouth for my own face and then use the simple deform geometry nodes to warp it to make a data set.

Kinda annoying they made this great markerless mocap stuff and then just stopped and went onto gen ai face replacement, which is over a boundary for me. Training a mocap algorithm on synthetic data seem totally moral ai use but generative ai stuff probably uses data without permission