It is not the best comparison
It is not the best comparison to pit peak sales with current sales. After the Model 3 peak, the model Y came out and dominated Tesla sales. The Chevy Bolt similarly had their peak at the model's debut. Also when there were equal tax subsidies available to competitors. When the Bolt got it's bigger battery pack, the EUV model was rumored, and similarly, the Leaf has the coming Ariya casting a long shadow. Importantly, government support for EVs has been very poor for years, but that appears to be changing now.