But that includes digital and sales from a ton of indies that have been doing good numbers. Vgchartz is tracking boxed copies sold at retail.
The same goes for other consoles like the ps4. If you included digital and indies sold it's number would be much higher then the 135m it's sold in 2018 as of December 8th.
Nintendo reporting sales of games only that have physical releases, so that means only digital releases (majority of Indie games) are not included in that number. And yes, next Nintendo update will show just how much off is VGChartz when comes to sales of Switch games.