Yes, the lack of discussion of tariffs in the article and even in these threads is a bit odd to me. The US has tariffs on Chinese electric vehicles in part specifically to keep cheap Chinese EVs off the market.
The complexities of this are outside my wheelhouse, but it's easy to see how keeping cheaper EVs out of the market would carve out a major source of cheaper vehicles period, leaving other manufacturers able to push higher priced cars. My guess is the tariffs are directly contributing to the process described in the article. Even if manufacturers were to "leave that market to China", eventually it would come to bite them as a certain proportion of people would start buying those cars instead.
Monopolies, monopsonies, and tariffs are playing a huge role throughout the US economy and it gets such little attention. Or at least it seems that way to me.