Granted, I've always had these kinds of issues with new laptops, especially when it came to proprietary nvidia or AMD graphics (before AMDGPU) and I agree it's improved a lot, but I still need to tell people that there's caveats with some (especially newer) laptops.
In 2022.
That is the kind of basic thing that does not work.
In addition to that, if you have a high-DPI laptop display and you want to plug it into a low-DPI desktop monitor (or vice-versa), good luck getting the scaling to work in a usable way.
It's not real multi-DPI no but effectively it does work. Does require a pretty decent GPU to render all screens at 200% before it scales them down though.
At one point I was using two 24" screens, one 1920x1080, one 3840x2160. I've tried messing around with settings, until I ended up on xrandr scaling as being, basically, the only solution. Five minutes later, the low-dpi display was in the closet, because I couldn't stand the blurry fonts.