@mcc If you don't mind a suggestion - you might do better looking/using Linux distro hardware certifications, instead of the vendor's list.
For instance, Ubuntu is certified on *an* X1, not sure if it's the one you've linked: https://ubuntu.com/certified/202102-28710
https://ubuntu.com/certified has a search engine and a list of systems we've run Ubuntu hardware cert on. Maybe your distro has something similar? (It's likely to work on Ubuntu certified systems, anyway).