It's a tricky one, because by some definitions it fits what is often called a metropolitan area, but there's no formal, objective definition of either urban or metropolitan area that is universally accepted. You're right it's probably wider than most uses of urban areas in English.

At the same time it's specifically meant to be aligned to OECD and Eurostats definition of a Functional Urban Area, which is a definition meant to ensure comparable statistics across countries, which neither the "old style" urban nor metropolitan area terms provide...

Which really just goes back to the main point that you can get pretty much whichever result you want here unless you narrow it down to the specific criteria that actually matter to you...