I don't know. In their communication, they are still talking about the "seven winter sports" (here for exemple) (Curling, Skiing, Biathlon, Skating, Bosbsleigh & Skeleton, Luge and Ice hockey).
Maybe, they did drop their retarded way of aknowlege "sports" and "disciplines". That would be a relief tbf.
Still, I don't think a host can propose a new sport that exists within an allready olympic federation. If anything, only non olympic federations proposed new sports for Tokyo.
Possibly, it's different for the winter olympics idk