That's a good point that I hadn't considered. I've never had a laptop with Nvidia, I probably subconsciously avoided those dual GPU setups as they sounded hacky and I never really needed fast 3D on a laptop.
I'm guessing it's because the laptops are popular enough that there's a dedicated group of people that make it work [0].
I'm still on X11, dunno what the story is like with Wayland though.
The one sample i know of first hand is an amd/nvidia laptop that never obeys the settings about which GPU to use. In Windows.