It’s kind of fascinating. In Germany recently the idea of a federal education ministry has been floated and the general answer was “no”. Other states don’t want to have to deal with CSU politicians trying to get “the purpose of the school is to instil fear of god” into law applicable on their turf, that BS can stay in Bavaria. The federation is co-responsible for tertiary education (university etc) because they have responsibility when it comes to research so they can set, in practice, some standards regarding secondary graduation but that’s it.