@Gene Hammons fair points you point out here. I'll give them a shot! Boomi I've seen earlier already - let's see how it turns out. And yes the idea was to use BI-Toolings on top - but enhancing the datasources with meta-information right before the BI tool itself, as there…

@Alfredo Novoa those are good hints to openMetadata and Apache Amundsen! I'll also try those! Thank you very much!

@Sarath Boppudi  thank you very much, that confirms my additional research in that topic. So the Keyword ist "Data Catalogue". I'll definitly have a look into Purview. Thank you!