You know, any geocoder that is worth its salt is able to geocode a POI inside a building with the correct address data around it.
In OpenStreetMap you should *not* tag things so that this is the only way of making them show up somewhere, you should fix your search.

You seem to hint on an upcoming import of the data on Spar branches in Switzerland, are you discussing this import somewhere?

And are you taking care to update the Spar data on https://nsi.guide/, so that future editors can profit from that?
