That doesn't really sound like it was any users input.
Didn't some food delivery service get their own phone numbers listed for various restaurants a few years ago?
If they are registered, the request goes to the business owner to approve in my experience. We used to get lots of phantom requests telling us our opening hours had changed but if you're registered you can just decline them.
Local Guides are ordinary unpaid Google accounts who submit reviews, photos, and other edits as I’ve detailed here. We are sometimes prompted to answer questions, but only with a blank to fill in.
https://support.google.com/maps/answer/7084895?hl=en
Google says "We review all the edits you make."
Laws are useless when you live in a country that doesn't care about enforcing them.