I found this "contactless dispenser" which seems to use IR sensors.

https://www.youtube.com/shorts/lQlggY29sbQ

And theres this talking candy witch, which you can 3d print.

https://www.youtube.com/watch?v=n9rjkIQ5XzI

Any others ?

Perhaps one with facial recognition, and a database of identifiable metrics, for rationing purposes ?

If that doesn't creep you out this Halloween, nothing will. :}