BYD has been expanding a lot since then, they have much more money than 4-6 years ago, they've rolled out more factories around the world. It's not a given since now they have both more experience, and more cash, the American market is huge so they might try to find the loopholes this time to have their products in the USA.

Probably much harder if tariffs on Canada/Mexico happen but if those don't materialise (which is quite likely because, well, it's going to fuck with American food prices, energy, etc.) then BYD's factory in Mexico will probably be there, ready to start exporting.