This is completely unsubstantiated. In 2020, Tesla had about 1/4 of the EV market and 1/6 if you count plug-in hybrids. This is big but not overwhelming considering they were the first to market with a serious product.

I have not seen any recent market share for 2021 but given onslaught of new products from every legacy car maker, I see no reason to believe they are falling behind. If anything, they are catching up.

https://insideevs.com/news/486325/world-top-ev-automotive-gr...