CATL's LFP batteries hit 205 Wh/kg in 2024, so "roughly" is doing a lot of lifting there. It's 17% heavier for equivalent capacity. And it's not just a little lower than nickel-rich chemistries, it's a bit more than half as much.
It's also not clear how valuable cold weather performance is, newer EVs use heat pumps instead of resistance heating, and share the cooling loops between the powertrain, battery, and cabin, so that the heat removed from the motors can heat the cabin and battery. They're going to need that system in place (to heat the cabin and cool the powertrain) even if a new battery type can operate at colder temperatures.
Sodium batteries don't differ enough from LFP in cycle lifespan enough to matter (not for this sort of use case, anyway), and the density is lower, so the only way they'll be competitive is if they're sufficiently cheaper.