I am not sure what makes a motherboard Linux-friendly… I guess fwupd integration with LVFS would be nice? Still, I am happy with my MSI B650 Tomahawk, since I can just put the latest firmware into an exFAT formatted thumb drive and update with it. All my laptops in the past had only supported firmware updates with Windows-only executables. I think I really should check out Framework for my next laptop.
That’s unfortunate. I got lucky with MSI.