Unable to answer "What kind of building is this?" for https://osm.org/way/543024864 via StreetComplete 51.1:

Invisible from roof top angle but on Google Street view (on the road next to it at least) it should show this is as 4 buildings (48,44,42, along with The Refil shop) and as such the boundaries need to be redone.
Am happy to help where I can.