I’m hardly an expert, quite the opposite, but I imagine coordinating all those groups across multiple countries that don’t have a unified bureaucratic system would undo any disadvantages of just working on them independently and open sourcing at all. In theory they could all start borrowing from each other eventually.

It's not just a structure problem. The needs are different. And monoculture is always bad, so developing a plurality of solutions is a good idea.

I'm not saying every small administration of a 200-souls village needs to do this, but on the scale of a nation who has a GAFAM budget in the hundreds of millions of euros (probably, haven't made the calculation), it's not crazy to invest a few million on a side project like this to reduce dependency.

Oh sorry that is what I meant i would like this to be a EU wide ecosystem working together.