You are correct, by now there are some standards. But look at the clusterfuck that the current digitization initiative is: for each service to be offered, a different municipality is responsible. Instead of all municipalities funding a common shared institution. We’re seeing entirely predictable results. :sigh:
1) https://www.fitko.de/ 2) https://www.xoev.de/ 3) https://www.xrepository.de/