I'm not sure why anyone would care what chip is in a router that should just sit there doing its job and you're not going to write or run other software on?
Sure it's kind of nice to know the car media player thing I've had for a couple of years has a RISC-V D1s/F133 chip in it, but I bought it because it receives CarPlay (and Android Auto) and transmits audio on FM (actually the best quality one I've had, and I've had a few) and cost $30, not because it's RISC-V.
And I'm eagerly awaiting a pico-ITX SpacemiT K3 box arriving in the next week or so.
But a router? Why do I care, past price and functionality?