Just as info for osarch:
Today, the BIM Portal Germany has been launched, on which all stakeholders of the value chain have collaborated: https://www.bimdeutschland.de/leistungen/bim-portal
In the future, all information in Germany on BIM will be bundled there.
One example here is standardization, in which a national strategy is now being developed by the German agencies: https://www.bimdeutschland.de/bim-wissen/standards
https://bimchange.sbb.ch/ <- same function however smaller without all the stakeholder in swiss