Even the base integer instructions are Turing complete in RISC-V. Only instruction extensions that could be a point of contention are Matrix operations, as T-Head and Tenstorrent already have their own. Even then, I can't find a reason how this "clash" is any different than those in the x64 or ARM space.

Even if Qualcomm makes their own RISC-V chips that are somehow incompatible with everyone else's, they can't advertise that it's RISC-V due to the branding guidelines. They should know them because they are on the board as a founding top tier member.