Thoughts on whether the ThinkPad P15 Gen 2 is likely to work?
Re: Tiger Lake U Series Core i5/i7 see qubes-issues #6411
There are 2 positive R4.0 reports with i5-11500 (ASRock B560 Pro4) and i7-1165G7 (XPS 13 9310). Both mention igfx troubleshoot is required.
There are 3 positive R4.1 reports with i5-1135G7 (Lenovo ThinkPad E14, ThinkPad X13 Yoga Gen2) and i7-1165G7 (System76 Lemur Pro).
In the existing P15 report I see two USB controllers, but that doesn’t mean the Gen 2 has them too. The website only lists two ports (not controllers). I bring that up because you mentioned it as a reason that the Librem 14 doesn’t work for you.
Personally I would stay away from Tiger Lake for now. As I mentioned many times before, when using Qubes OS you will do much better going with a 2-3 year old PC. There is plenty of power there, but you will have to go for something preowned or refurbished. The P51 was a bag of trouble when I got it new (company PC) and then over 2+ years it reached the point where it made it on the “just works” list. Don’t know how many other ways I can shout it from the rooftop: “shiny new” and “Qubes OS dom0” don’t go together very well and probably never will.