Yes, which I think is also very common, but what Wikipedia was referring to is that there's no official second-level domain for Government, unlike say gov.br or gov.uk).
Gov.nl is just a domain owned by the Dutch Government, like gov.ie or belgium.be.
As far as I can tell .gov.nl is only used for pages aimed at i.e. expats and businesses. Most services dutch people use simply have a .nl page like the digital id or filing taxes.