If the OP is in the US, Chinese cars are unavailable since they don't meet US standards. Additionally, there is a level of protectionism that will try to prevent them from being introduced in the US.

There are also 100% tariffs on Chinese cars in the US. so doubling the price. Chinese EV manufacturers will likely set up final assembly plants in Mexico and ship them 90% finished, and then they will be able to circumvent that tariff. That's how Chinese steel manufacturers get into the US market.

They're unavailable for the same reason they're expensive here in Germany. Government protecting the local automobile industries.

Are they low-tech? at least BYD presents all the known tech, bells and whistles for a lower price.

What's the definition of low tech? Golf carts? Cars without a screen seem about as rare as phones without a camera.

They are nor low tech, not a real budget cars.