Many of the underlying IP areas of RISK-V advanced features are not public implementations.

Yet there are still a lot of great projects around, that may end up in China grey market chip fabs (C950) at some point.

https://github.com/vortexgpgpu/vortex

ARM64/AArch64 is about constrained consistency, but most RISCV standards groups still fail to recognize their ISA version fragmentation was a serious mistake. So no, it won't exist outside niche use-cases until the kids stop arguing over what RISCV even means in a general end-user context (BOOM flags, RVA23, etc.) =3