The CPUs are designed by Graisler Research in Sweden, who have decades of experience in space electronics and probably have thousands of CPUs currently orbiting the earth.

And yes, they have RISC-V versions but I don't think they have been battle proven as much:

https://www.gaisler.com/index.php/products/processors/noel-v

That appears to be a soft CPU...vhdl for an FPGA, rather than an actual CPU.

They are defently targeting chips.

It targets both ASIC and FPGA.

I do not know about commercially available, but the ESA has long selected the RISC-V NOEL-V[0] to succeed LEON in their space endeavors.

0. http://microelectronics.esa.int/riscv/rvws2022/index.php