Unable to answer "Is this road completed?" for https://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