@nemobis Is it mapped in OpenStreetMap? It may!
There is a tag "amenity=fridge" I see, it's a proposal.
https://wiki.openstreetmap.org/wiki/Tag:amenity%3Dfridge
"access=yes" could be added to signify it's a community fridge.
Edit: there is a much appropried tag: "amenity=food_sharing"!
https://wiki.openstreetmap.org/wiki/Tag:amenity%3Dfood_sharing
Already 425 in OpenStreetMap, see just below:
https://overpass-turbo.eu/s/1WBr