"According to website its permanently 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: 2025-06-02T08:01:20Z
POI name: Sauers Hofladen
POI types: shop-farm
#CoMaps android

"Minigolf category not selectable"
OSM snapshot date: 2025-06-02T08:01:20Z
POI name: Adventure Golf Dangast
POI types: leisure-park
#CoMaps android