Unable to answer "Is this road completed?" for osm.org/way/760001451 via StreetComplete 55.1:

It is not so much the road being completed or not. The two flats (appartment buildings) on this side of the road are being demolished. That is why this part of the road and the parking area are not available right now.

https://www.hetkrantje-online.nl/nieuws/actueel/149540/sloop-aan-nieuwstraat-in-leidschendam-van-start

Unable to answer "What’s the name of this place?" for osm.org/way/240507827 via StreetComplete 53.3:

This part of the camping is an open air 'dining area' with a few picknick tables on it.

Unable to answer "How many levels above the basement does this building have?" for osm.org/way/271587168 via StreetComplete 51.1:

Op deze plek staat geen bungalow (meer?)

The final part of the Johannes Camphuijsstraat between Stuyvesantstraat and Schenkkade is incorrectly labeled as "Abraham Patrasstraat". (The actual Abraham Patrasstraat is roughly 300m to the west, and correctly labeled in OSM.)

via StreetComplete 49.2

Unable to answer "What are the collection times of this PostNL postbox?" for osm.org/node/3414972412 via StreetComplete 38.1:

There is a postbox roughly 50 meters away (corner Parkweg), but that one is already on the map.

Unable to answer "Is this still here? (Waste Basket)" for osm.org/node/2378148844 via StreetComplete 38.1:

The nearest rubbish bin is on the pavement of the Spinozalaan. (And there are several bins next to other benches in this part of the park.)

Unable to answer "How many levels above the basement does this building have?" for osm.org/way/265507887 via StreetComplete 37.0:

There are two parts of diferent height, but the building is (slowly, very slowly) being demolished, so it is of little use to change it.
https://www.hetkrantje-online.nl/nieuws/actueel/109717/kantoorgebouw-klaar-voor-sloop

Unable to answer "What kind of building is this?" for osm.org/way/264845477 via StreetComplete 37.0:

It is a public library
https://www.bibliotheekaandevliet.nl/adressen-en-openingstijden/detail.199439.html/bibliotheek-voorburg/

Unable to answer "What is the name of this place? (Christian Church)" for osm.org/way/265664641 via StreetComplete 37.0:

It is not a church, and never has been. It is (the chapel of) a Roman Catholic cemetery.
Name: "Rooms Katholieke Begraafplaats Sint Agatha"
Website:
https://begraafplaats-st-agatha.nl/

Unable to answer "What religion is practiced at O.L. Vrouw ten Hemelopneming?" for osm.org/way/53005120 via StreetComplete 37.0:

Former church (Roman Catholic); not in use a church anymore