BYD only entered the Australian car market in 2022.
They are now the 2nd biggest seller after Toyota (https://www.msn.com/en-au/news/insight/byd-overtakes-rivals-...).
They are also priced much lower than KIA and Tesla.
FWIW I now own a GWM Cannon Αlpha PHEV pickup. Have also owned a Jeep Wrangler - the tech, build quality and reliability is not even on the same planet.
I can't imagine how the US manufacturers would compete with the Chinese ones on a level playing field. Not from the US, but it's hard to see how any administration would allow that. Would be the end of the local industry.
US manufacturers' niche is half-ton and above trucks. Even mighty Toyota's offering is playing distant #4 in that market with Nissan capitulating after 20 years of trying.
In Australia, the cheapest BYD EV is cheaper than the cheapest Toyota.