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.
Now they just need to change the name so it's not so obviously French, and invite collaboration from the other large EU countries. I wonder how many Dutch or German will think of "La Suite Numerique" as an EU-wide office suite.
German version is here, but unlike France they're mostly boosting already-existing German open source software (like Nextcloud and Open Xchange): https://opencode.de/en/home
I don't know how the Netherlands really fits into all of this, but I know they're one of the biggest funders of open source projects in general via NLnet. Seriously, their list of projects they've given money to is ridiculously comprehensive, you're going to struggle naming some that are not listed here: https://nlnet.nl/project/index.html
That said, the Dutch government is collaborating with La Suite (fr) and OpenDesk (de): https://minbzk.github.io/mijn-bureau/