It's does not!
RVV support is only on the DSP (I asked them), and I'm personally not sure even that is true, as the EsWin EIC7700X DSP has a cadance XTensa chip.
Yeah, it seemed strange since to my knowledge no out-of-order vector RISC-V chip exists at the moment.
Interesting, hopefully DC can fix their advertising/clarify a bit more!