Comment by blacklightpy

Literally every open source RISC-V Chip, SoC and Board I know are Chinese, aside from SiFive. Alibaba T-Head Xuantie C9-series and E9-series CPU cores, StarFive JH7110 SoC, Alibaba T-Head TH1520 SoC, SOPHON SG2042 SoC, StarFive JH8100 SoC (TBA), several RISC-V boards from Milk-V, BananaPi and SiPeed which are state of the art RISC-V boards.

I think US are the ones doing less.

Edit: Just realized SiFive was US based, not Chinese, so edited it out.