If you click on a "Property" page, you generally see a list of pages that use that property, arranged in columns, each with an attached "plus" sign.
The right-hand side plus signs should lead you to Special:SearchByProperty, with introductory wording: "This page provides a simple browsing interface for finding entities described by a property and a named value. Other available search interfaces include the page property search, and the ask query builder.".
In 2019, User:Thurstan reported that some of the right0hand plus signs do not work properly. We do not know why and do not know how to fix it.