PP the economist.
I think you could argue that completing the degree makes you an engineer. See this page.
Maybe you could say that the person lacks experience to create solutions. But a smart degree-holder probably has the skills to analyze and explain engineering work at a technical level. They just shouldn't be stamping documents.
https://www.mtu.edu/engineering/about/engineers/#:~:text=Engineers%20apply%20scientific%20principles%20to,tools%20is%20their%20own%20creativity.
I looked at the NSPE code of ethics and it covers engineers not going beyond their expertise. In media and outreach roles, I think this would be a very limited "practice" of engineering. But still reliant/benefitting from the training.
I don't think this person is misrepresenting their background. Many undergrads call themselves engineers just as shorthand. I wouldn't invest a lot more time in worrying about this. If you ever met the person, I'm sure she would have reasonable reasons for her self-identification.