RIVIAN vs Chinese EV Stocks ?

Why is Rivian so slow in scaling

2021 - 1000 deliveries 2022 - 22,000 deliveries 2023 - ???

On the other side we have Chinese EVs like BYD, XPENG, NIO delivering 200,000 cars yearly and they are planning to enter US in couple of years.

Are there any other pure US bases EV companies (besides Tesla and Rivian) ?
$Rivian Automotive(RIVN.US)$ $Tesla(TSLA.US)$