This video here describes why BYD is so competitive: They have done a splendid job vertically integrating as much as they can to get the price down. This $11,500 EV is an excellent example of how other companies should start to shift their thinking.
Seems like it is sold for around 18,000 Euros. It obviously passed European safety standards, no point in getting homologation certification for the US if it remains tariffed to high hell but if they wanted to I'd assume they can pass US standards as well.
[1]: https://www.youtube.com/watch?v=izvdO-zdlKg