There is already this question, but the answer is outdated and in current Facebook settings I see no way of changing the predefined questions.
So how to do it?
In my Inbox -> Chat plugin settings I have no Frequently asked questions defined (I even disabled the feature - screenshot from settings) and the default questions asking about store location, opening hours and such still show.
When I add one frequently asked question, this question appears nowhere. It doesn't replace the default questions.
So what is going on? How can I remove and change the default Facebook chat plugin questions?