"This is not a metro station, at least not available for public or passengers"
The place has gone or never existed. A user of Organic Maps application has reported that the POI was visible on the map (see snapshot date below), but was not found on the ground.
OSM snapshot date: 2026-02-16T20:35:12Z
POI name: 's-Gravenweg
POI types: railway-station-subway-rotterdam
 #organicmaps android 2026.04.07-12-Google