They're already here (Polestar) and not inexpensive. There's also Vinfast, which is Vietnamese but has similar labor costs, and they're also not inexpensive (or very good judging by reviews). XPeng and BYD are likely coming, but once they've been modified to meet US regulations, invested in appropriate facilities (showrooms, service arrangements, etc.), shipped them, been taxed for importation, or built here if they're going to do that, I'm skeptical that they'll be significantly less expensive than other options and likely more expensive than GM. I think it's going to continue to be hard to beat GM for price-competitive EVs.
As someone else speculated, it wouldn't surprise me at all if this Tesla price drop proves to be temporary. While it's here though it certainly does make the Model Y more attractive! I like the Ariya better and can afford it so am sticking with my reservation, but if I didn't already have one on the way I'd seriously consider the Model Y. IMO, Nissan needs to consider a price decrease for the Ariya and also move production to the US so that it qualifies for incentives.