I've got a last-gen Lemur that I really like. (lemp10 / 11th-gen Core i7-1165G7, one generation older than jart's link.) I'd recommend their new one on that basis. I'm pretty happy with Pop OS.
However, I'd say the decision between it and the Oryx (which OP has on their poll) is about OP's needs and preferences, rather than one strictly beating the other.
It has a long battery life even after a few years of use, compared to other laptops I've used (higher rated capacity, and probably lower power consumption than the Oryx). It's very thin and light, but still fast and doesn't get very hot.
One caveat though: it's got no discrete GPU, which may or may not matter for you. (Probably that accounts for a good part of the battery life.) If the Lemur were my only computer I'd probably regret it on that basis. Its specs, even setting aside the GPU, are also going to be less impressive than the Oryx.
But the Lemur is about half the weight - I would happily trade the performance for battery life and mobility. I also like the ability to charge with USB-C - a non-power-hungry laptop means you don't require a special power connector (or more advanced USB power delivery that IIUC isn't really widespread yet).
Does Discrete Graphics work in Linux somehow? Does it require some drivers? At ZBook I needed to change to UMA Graphics because it uses much less CPU and works better.
Yes, it works, and yes, it requires drivers, but those are readily available as I understand it. Some of the Linux laptops the OP mentioned do have discrete graphics cards (Oryx, for example, has an Nvidia card; for clarity, like all of System76's computers it comes with Linux).
As I understand it, if you are willing to run proprietary code you can sometimes get better drivers. I would be fine with that, personally, but not everyone agrees. ("Proprietary" refers to availability of source code - some drivers are free-as-in-cost but not open source, and you might have worse performance with open source drivers. This might just be Nvidia, or it might be AMD/Intel too.)
