Reading the opening section, this does not seem to apply to off wiki locations, such as reddit, Wikipediocracy, etc.? I am confused because it is linked from https://en.wikipedia.org/wiki/Wikipedia:Harassment#Off-wiki_harassment as "see also".
Topic on Talk:Code of Conduct
It applies to some off-wiki locations, like in-person hackathons or technical services that are not wikis, like Phabricator, Gerrit, etc.
So no, it wouldn't cover reddit nor Wikipediocracy. Of course, the CoC is just one enforcement pathway. If someone is being harassed in non-CoC covered spaces, a local admin here may be willing to intervene, or it could be escalated to WMF Trust and Safety.
Are you looking for Universal Code of Conduct? This is a code of conduct specifically for the technical community (where, fortunately, harrassment via external channels hasn't been a concern).
Ah, I think I was. It may be good idea to mention the UCC in the lead of CoC (here) more prominently, to avoid confusion.