Per Wikimania 2018 discussions
d:Wikidata:WikiProject_WLM/Status only lists the WLM datasets that exist in the Monuments Database.
There are additional datasets that either exist on a Wikimedia project but as unstructured lists, hence cannot be harvested to the Monuments Database, or which were imported directly to Wikidata.
A second table should be set up for these to get a broader overview.