Arguably, the leading RISC-V IP is from US firms like SiFive; it has also caught major traction with NVDA in custom products, and US Govt for various industries, and even Redhat is now supporting RH on Risc-V

Microchip Inc partnered w US Govt on the aerospace angle and funded Canonical for linux ports. Their Polarfires and now Euro aerospace like Gaisler are heading in the same direction. US Govt/DARPA and others have been funding risc-v ports for years, to include mainly automated porting.

There are big differences between lowend profile-challenged SBCs and the work of NVDA, Microchip Inc, and the US Govt in the much more highend GPU related, and safety critical industries.

With Heavyweights like IBM/Redhat now on risc-v joining canonical and others, the SW side is definitely improving

TSMC btw, has always been about labor arbitrage