I noticed in the revisions of Why is "Can someone help me?" not a useful question? that an attempt was made to add a "canonical link" to the question, apparently intended for copying and pasting into Stack Overflow comments to point at policy. E.g.:
Canonical link:
[Please specify where you are stuck.](//meta.stackoverflow.com/q/284236)
This change was rolled back by a moderator, with an edit summary claiming that comments offering such a link will also be removed. Similarly, Why should I post complete errors? Why isn't the message itself enough? (which I have had to refer to very often) doesn't offer such a link (although no attempt was made to add one).
However, other FAQ entries, such as Why should I not upload images of code/data/errors? and Why should I provide a Minimal Reproducible Example for a very simple SQL query? (which incidentally has an overly specific title) and Why can't I ask customer service-related questions on Stack Overflow?, do include such links.
I fail to see how these questions are substantially different. Much other discussion on Meta has established the value of having copy-and-paste "template" comments to save time and frustration (and therefore avoid Code of Conduct violations in the long run) for curators. Personally I think that including a link like this - even if we don't call it "canonical" - makes sense for every FAQ entry that is generally about the content of questions and/or answers, at a minimum.