They have already started mass production of the cells at CATL, etc. I would guess building packs and larger products on that will take some development, a year or two? But I see 18650 sodium ion cells on Alibaba, although I couldn't say if they are actually as advertised.

Edit, I suppose it depends what you mean by consumer use. Are you asking when they'll be in every corner hardware store? Or when people can buy cells/packs for DIY projects online (which would be something you can do now).