Yes, the bZ4X, like its Subaru sibling the Solterra, has a heat pump.

Toyota also says the bZ4X has raidant floor heat, which is a first in its vehicles. It's supposed to help save the energy required to heat the car by up to 20%


Radiant heating. While there’s a heat-pump to help with chilly weather—something Toyota has offered in some of its vehicles for years—the automaker reaches deeper into the toolkit here. It says that the bZ4X’s radiant floor heat is a first in its vehicles, and we’re not aware of any other model that offers it for the U.S. market. It’s an idea that’s been in the works for years. One such project, headed by IAV and Louisenthal, said that a system using foils integrated around the cabin could help save the energy required to heat the car by up to 20%—but just installing it in the floor could go a long way to that. Toyota will offer seat and steering wheel heaters, too, of course.