Wake me up when governments actually start writing checks. I bet the ICC will stay on Microsoft because doing anything else would be difficult. All anyone in big org IT knows is Microsoft, and no one wants to change.
You might say it is a little more complicated, but actually it isn't. Nobody wants any kind of change, so things stay as they are. Only the Americans can change things and change your Windows/Outlook/Azure, because then "it is like it is, we have to update"...
One line of functioning code?
But as always, most of it is pork for some cronies anyways.
One related thing that has been developed/packaged is the "sovereign cloud stack" https://scs.community/ . However, it didn't see much use yet, for the reasons mentioned.
Europe could easily have its own stack but I'm not sure taxpayer money would ever reach the right people to make it happen.
This is already happening. The European Commission funds thousands of open-source projects:
For instance, Stalwart is an open-source, Rust-based mail server and collaboration suite that has received grants from the EC:
So globalisation is actually not the answer here, the opposite has to happen.