"Cannot find it"
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: 2023-01-21T19:25:03Z
POI name: Hauptstr.85 77694 Kehl
POI types: amenity-post_box
#organicmaps

Bus stop is here

via StreetComplete 50.2

House 61 in the middle

via StreetComplete 50.2

Playground

via StreetComplete 50.2

In context of "Sidewalks" overlay for osm.org/way/301932335 via StreetComplete 50.2:

Walking street

In context of "Sidewalks" overlay for osm.org/way/301932331 via StreetComplete 50.2:

Walking street

In context of "Sidewalks" overlay for osm.org/way/23739940 via StreetComplete 50.2:

Residential street

Big new apartment building

via StreetComplete 50.2

In context of "Sidewalks" overlay for osm.org/way/23740540 via StreetComplete 50.2:

Residential

Attached photo(s):
https://westnordost.de/p/131534.jpg

No water here anymore both fountains are covered with wood

via StreetComplete 50.2