Unable to answer "Is drinking water available here? If so, what is its source?" – Drinking Water – osm.org/node/820017741 via StreetComplete 58.2:

It's a public bathroom. There's an outdoor sink, but no drinking fountain that I can see.

Attached photo(s):
https://westnordost.de/p/226875.jpg

"recently opened"
OSM snapshot date: 2024-02-28T20:33:36Z
POI name: B&T's Deli
POI types: shop-deli
#organicmaps android