Yes. It’s optional. Even if you don’t answer they still do a brief look. I had a “ Public Safety Professional in the Law Enforcement industry from Washington DC-Baltimore Area” look at my linkedin when I got my latest ESTA a few weeks ago. Not sure if that’s because it had been 18 months since my previous one expired.
Is that part of the ESTA questions these days? I have heard reports but couldn't find a screenshot or similar.