It is amazing how often people seem to forget this. The only thing RISC-V means is that the person designing the cores doesn't have to pay a license fee for the architecture. It doesn't say anything about the open-ness of the core IP itself, let alone the final SoC.
Nothing is stopping you from making a RISC-V chip locked down tighter than Apple's, and nothing is stopping you from making a completely open chip based on the x86 parts whose patents have expired.