Small RISC-V cores are weirdly all over the place. I think NXP and some others have a RISC-V core inside some of their ARM cores as their security coprocessors and other peripherals. The architecture is getting around it’s just not hitting much toward the application processor yet. It’s getting there but running a full on PC is such a complex task over micros or special purpose devices.
Smol Mac Pro would have been the best possible reality here.