@dskinner The ‘wix system’ doesn’t create pages, and these cities will only have a dynamic page assigned to them if you have created a backend snippet that inserts these cities into a database based off of some list of cities you feed it. Otherwise if a user attempts to access a URL with this path and it doesn’t exist, they will always see a 404.
If you are talking about functionality for a search page, that’s a different question entirely.