Exactly, you will not be able to register it in the US and completely import it because as there is no market here, BYD has not gone through safety and compliance testing in the US. For such cars, legally importing it would require you to buy it as an antique over 25 years later, or for you to pay for your own crash testing among other things.
The "easiest" way to drive a BYD legally in the US would be to have foreign residency, register the car in that country, and temporarily visit the US with the car, still using the foreign license plate and registration. This is why the Texas Mexico border in the US sees a few BYD cars, from Mexican residents and dual citizens visiting or living part-time in the US.
The "easiest" way to drive a BYD legally in the US would be to have foreign residency, register the car in that country, and temporarily visit the US with the car, still using the foreign license plate and registration. This is why the Texas Mexico border in the US sees a few BYD cars, from Mexican residents and dual citizens visiting or living part-time in the US.