"RISC-V" isn't an organization that can "move to multi-chip modules". RISC-V is a foundation which essentially publishes a couple of PDF files (the user spec and priv spec) and organizes a bunch of other stuff around reference hardware designs, simulators and the software toolchain.

All of this is BSD licensed, so anyone can pick it up and manufacture chips based on the specification or by modifying one of the reference designs. Note that the largest part of designing and building a chip is not the choice of ISA (that's probably well under 10% of it).

What you may want to know is whether any manufacturers are going to make modular RISC-V chips. None of them to my knowledge. But most of them are currently focusing on the ARM space (embedded, IoT, AI, etc.) including this particular design.