In context of overlay "Places" – Arcádia (Cafe) – way/215182298 via StreetComplete 61.3:

Seems to be where "Livraria Fugueirinhas" is (a little further north)

"i went here to have a snack and verify it has closed"
The place has gone or never existed. A CoMaps user reported that the POI was visible on the map (see snapshot date below), but was not found on the ground.
OSM snapshot date: 2025-06-22T05:04:15Z
POI name: Diplomata
POI types: cuisine-american amenity-cafe cuisine-diner cuisine-pancake
#CoMaps ios