I'm sure their MDM solution has something like this built in, what I'd be more concerned about is how easy it would be to just reset the iPod and...have a new iPod. Unless the MDM activates apple's activation lock, there isn't really anything stopping someone from doing that.
Their devices weren't meant for corporate use, they had to adapt to corporations wanting to use their devices. They were never built for retail or logistics work as they are being used here. The reason the company went with windows CE is because that's a good platform for the work that was being done (the overall design of webapps sucks though, rendering a webpage instead of having it as native software is much slower).