Clean technica agrees that VW ships more. VW has more brands and models. Tesla model 3 may be the top seller, but it's one of only 2 models that Tesla has with significant volume. For instance Audi is a VW group company too. Together they have ~5 of the top 20 EVs.
[1] https://cleantechnica.com/2021/12/30/15-of-auto-sales-in-eur...