Earlier quoted context omitted.
Much higher standards than European ones? Because the cars do sell there as well.
Yes. The EU focuses on safety of pedestrians, and the US focuses on safety of occupants. That's not to say a vehicle cannot do both well (see the many European vehicles sold in the US), but that is to say Chinese vehicles may not meet the US standards. The US has a lot of vehicle regulations that significantly differ from the EU market.
You can look at the Euro NCAP ratings for the 2023 BYD Seal, for example: https://www.euroncap.com/en/results/byd/seal/50012. They break down the rating based on safety for adult occupants, child occupants and pedestrians. These ratings are based on many different crash tests.