From a Reddit post[1] by one of the coders involved in the effort. Post contains a video summary.

Interesting React wrapper for existing pure JS/CSS framework developed by the French Government. All Open Source and maintained.

Also interesting is the https://code.gouv.fr/ where one can find repos of tools and sites across many state organisations.

[1]: https://www.reddit.com/r/reactjs/comments/10gwean/the_french...