I really wouldn't be surprised if they had an AC direct for this week, but it (and the game) have been pushed back. Can they get the game out of China?
Yes, they can, because Switch carts are made IN Japan. There will be no issue getting the game itself out, for any region.
What the Coronavirus is affecting is the production of hardware, such as Switch consoles, JoyCons, RingFit rings, etc, that are produced for Japan. Because the manufacturers in China are not working at full capacity, the supply of hardware specifically will suffer.
In the West, the supply is not constrained. This may be in part because Nintendo shifted some (or all? Unsure) of Switch hardware production meant for the West to Vietnam, in order to avoid American tariffs. Not 100% sure on this one.