Home page for the entire suite (in French) with some screenshots: https://lasuite.numerique.gouv.fr/
Code bases are on GitHub and they use English there: https://github.com/suitenumerique/
Dev handbook (in English): https://suitenumerique.gitbook.io/handbook
Not French and I can't say I personally tried deploying any of them, but I've been admiring their efforts from afar for a while now.
Visio does seem built from scratch but I wonder if it's a temporary thing until element is feature complete with their move away from Jitsi.
You can find more about la suite on their website and the opendesk one (German project using mostly the same software). Unfortunately I don't have the links to hand here.
Visio (aka meet) began in parallel with Element's work on MatrixRTC and Element Call. Hopefully the two can converge, given they are both built on LiveKit.
In understand it's also the French word for Videoconferencing, but even still...
So for example, I can't trademark "Apple" for my apple orchard. But I can trademark it for my computer company. Similarly, MS likely has chart visualization tools covered by "Visio" in France, but not telecommunications software.
Trademarks aren't granted to a company for unrestricted use. They're granted for specific use. Like I can't found a computer company, get Apple trademarked, and then buy an orchard, use Apple for the orchard, and then sue every apple orchard for saying "XYZ Apples" in their name. It remains restricted to a specific use that was included in the initial application for TM.