The US EV market is only stalling because the lobbyist are purposefully crippling development, the manufacturers are circlejerking each other, and every foreign brand either has no interest in selling in the US, or is banned from doing so
You're probably cheering on the outsourcing of techworkers too, right? Who cares about the safety of the people building the things we want to buy cheaply, right?
Protectionism can go too far and often does, but it isn't unnecessary for healthy societies. Free, unregulated trade isn't always the right answer.
Protectionism is almost always because domestic automakers get complacent in their corner of the world and don't want to innovate to compete. See how Harley Davidson benefitted from Reagan's policies in limiting the imports of foreign bikes to the US. Ever since then almost all their bikes have looked like they've been stuck in the 1950s yet cost like how inflation would be like 20 years from now. Using underpaid American workers as an excuse to bring on these tariffs and bans just doesn't convince me if we haven't been innovating to improve technology or lower costs at the same time.
A big portion of the market in the US is from foreign brands. The only domestic companies are Tesla, Rivian, GM, and Ford. The rest is Hyundai, Kia, VW, BMW, Toyota, etc. China isn't banned from selling here but like in Europe, has a tariff because they're trying to manipulate the market with unsustainable subsidies for their own national brands at the exclusion of everyone else.