Sorry, but that is completely wrong. RISC-V is an ISA, nothing less, nothing more, and it is completely, 100% open-source. The licensing of the hardware implementations is a different matter, but that’s outside of the scope of RISC-V. As I said, it is just an ISA.

There’s plenty of designs out there that you can load onto an FPGA or, funds permitting, send off to a fab to burn into silicon.