This is essentially down to marketing strategy. Tesla only makes two mass-market cars, the 3 and Y. This is pretty unusual in the industry. VW Group, say, makes about 10, with another 10 or so coming soon, all on the same platform, some of which, like the Cupra Born, are just a straight-up rebadge of others.

The number of sales of a _specific model_ of car is rarely a useful comparison point, because, in most cases, any given model of car has a bunch of sister models for market segmentation purposes anyway.