Board Thread:Support Requests - Getting Technical/@comment-4503522-20200911182749/@comment-9605025-20200911191229

What the help page links to is the general portal to more information on Facebook widgets. Some of them Fandom does allow which is probably why it links there. However, that doesn't mean Fandom allows everything listed in the Facebook documentation. If you tried inserting the code as specified by Facebook and it didn't work, then Fandom probably just doesn't allow that widget.