Well every single time an article is posted about Germany, it turns out it's a single state and that they reverted a few years later.
And here in Estonia, government departments are actually trying to get their private contractor companies to switch to Teams for "ease of communication". That's how bad it is. Yes, the official stance is "we'll see about using FOSS more", but that's not reality.
I suspect a good majority of European countries still use Microsoft on most of their government computers. France and Denmark are making the move, but not sure if anyone else is unfortunately.