A former employer said that FedEx shipping info would be attached to my separation email. It was not. I emailed the two people at HR who had been involved in my separation. Three times each. No replies.

I still have the laptop. And a hard copy of the emails.

Also, as an aside, it is ABSURDLY easy to bypass MDM and DEP on a Macbook Pro, even a later M series laptop. Absurdly so (anyone here could do it in about a minute or less, and have a de-MDMed, fully updatable, no weirdness laptop. Theoretically).