Found some querying inconsistencies in the Module Finder when it comes to modules listed under the "Other/unknown" manufacturer:
...
-- drohn"other/unknown" is excluded on purpose which makes sense to me.
There is a hint when you have 0 search results as well:
-- modular01
Ah indeed, honestly hadn't even noticed that yet. To me, it doesn't make sense if you enter the actual name of the module in your search criteria, but anyway: problem solved. Thanks!