There is no legal definition for a flying car, so they can use the term if they want. It’s like the term AI that gets thrown around a lot, but actually people mean an LLM, but technically even a checkers program is in the AI category.

The USA industry term is a “roadable aircraft” and legal is also moving to that term. In Europe the legal term is FlyDrive vehicle. And the thing in the article is an SC-VTOL (special condition) in Europe and powered-lift aircraft in USA.