VisX is mentioned in the about page, so presumably. https://www.react-graph-gallery.com/about, that page also gives some motivation on why this is a separate project.

Yes I know about VisX.

The approach is kind of in-between what I suggest and what a classic JS library like Vega does.

It is definitely a very good abstraction imo!! But I'm always scared to be stuck with a customisation I cannot do because of a layer of abstraction.

Wow how have I never heard of this? Looks wonderful

Harry (the guy who wrote it) is skilled but not a JS thought-leader Twitter personality. I know about it because I worked at Airbnb back in the day. https://twitter.com/hshoff