Other than BIOS/UEFI as far as I know nothing is stopping them from using existing chipsets/motherboards. I don't recall anything on the chipset itself being in

Other than BIOS/UEFI as far as I know nothing is stopping them from using existing chipsets/motherboards. I don't recall anything on the chipset itself being inherently tied to x86 per se. I think even port IO is handled in the SOC/microcode these days. So they could probably do it. Particularly if they reused things like the AMD IO die etc. No need to reinvent the wheel because the cores are different.