Don't see why it wouldn't work, as UEFI is basically a hard requirement for running Windows. With UEFI support, there's a lot of functionality that's assumed to be there (e.g. basic graphics) that the question becomes "is this actually good?" rather than "can this work?".
I have not. But if it was my plan, I would buy a Snapdragon Thinkpad because Thinkpads have the best Linux support.
For reference the T14s has a page that doesn't appear to list terrible problems.
https://www.thinkwiki.org/wiki/Category:T14s
Don't see why it wouldn't work, as UEFI is basically a hard requirement for running Windows. With UEFI support, there's a lot of functionality that's assumed to be there (e.g. basic graphics) that the question becomes "is this actually good?" rather than "can this work?".
https://news.ycombinator.com/item?id=42499622