It's a tough task for sure and part of the reason I went with that T14. I knew there were enough of those units manufactured that any issues getting something working in Linux had likely already been solved.
Also a lot of times when you buy something and it has a certain amount of ram it can be initially unclear if that memory is soldered onto the motherboard and if it is expandable what is in what slots and if there is a slot available. That is part of the reason I went this route and cranked it clear up to 48 GB of Ram and clear up to a 4TB drive. I didn't want to run into a limitation on that stuff in the next couple years on that machine especially if I have to run some AI models locally on it.
I do like HP Elite Books but didn't find exactly what I was looking for with one of those.