The screenshot suggests they use Windows 7 (could be one of the IoT versions that recently still received updates, but I doubt it). I don't think 7 had the system features listed in the kiosk mode documentation.
Exactly this. They should be using a very stripped-down Windows IoT build in kiosk mode. Even for this outdated (and insecure) generation it looks like they're not actually using the Embedded version of Windows. While I don't think that had a named "kiosk mode", there were lots of things one could have done to make it not just crash to a regular full-featured desktop.
