The Netherlands has become a very secularised nation. That is why religion was a toppic not discussed in the interview with the King and Queen.
Both the Nieuwe Kerk in Amsterdam and the Great or st Jacobskerk (st Jameschurch) in The Hague are no longer used by the Dutch reformed Church as church buildings. Both now have a secular use but from time to time revert to a house of worship for special events in the Royal House. The Westerkerk where Beatrix and Claus married still is a church and so is the Kloosterkerk in The Hague where princess Ariane was baptised.

Many Churches both Catholic and Protestant were too empty to maintain so have either been demolished (my parents weddingchurch, my own baptismal church and the former church of the Bishop of Breda [where i had my 1st and 2nd communion] have been demolished ) or given a new destination. Some smaller churches have become homes others a shop. There is a beautiful church in Maastricht that now is a bookshop.

Beatrix' last engagement as Queen was to open an exhibition in the Jacobskerk in The Hague for that exhibition they even build a replica of the Orangehall from Huis ten Bosch Palace inside the building.