I think https://github.com/diegomura/react-pdf is closer to what this company is doing.

In fact their open source library, https://github.com/OnedocLabs/react-print-pdf, seems like a higher-level library that sits above react-pdf. Reminds me a lot of the set of react-pdf based components I built for a corporate job where letting users create PDFs was a huge part of the value proposition.

They're solving a really cool problem, actually, because building out into certain difficult use cases like SVG support was a huge pain.