They do, they’re just not as affordable compared to their counterparts with the same specs. I wanted to go with a System76 again, but I couldn’t afford it.
DELL and Lenovo offer a few options as well, but honestly if you want the best bang-per-buck, you shop around for a good deal and then research if the hardware is “Linux friendly”.
In the case of many modern laptops with Intel RST, there was an issue post-installation in which the boot process will fail because the vmd module was not loaded early enough. (This has been corrected for Manjaro ISO 21.1.4, but not corrected with upstream Arch Linux as far as I am aware. Other distros also applied their own patches.)
Hopefully this one change will allow more users to install Manjaro on their new laptops without having to edit any config files or do manual interventions after installation. 