digitally scanned on set without their informed consent

Well, yeah: They were recorded by digital cameras. You only need a front and side shot to make a realistic image of a person in any situation/position you want. If you want it to be very accurate you need a few more profile shots (both sides) and if you want the video to be accurate you need a recording of them walking, running, and making a few more motions but that’s it.

We also have no transparency around how our performances, likeness and personal data are being recorded, stored

Welcome to the club. That’s literally everyone these days. There’s cameras everywhere! Privacy-minded IT people have been complaining about this problem for decades. Now you want to do something about it because suddenly it impacts you?

Better late than never, I guess.

I hear some of their identifying features were captured in high resolution and distributed via subscription services.