And yet https://www.vbulletin.com/forum/misc.php?do=bbcode doesn't include it, and note that www.vbulletin.org is "The Official vBulletin Modifications Site" so may well be a modification itself, and in both cases we're looking at what those forums support, not necessarily the officially supported features of vbulletin.
I can't see any reason we'd explicitly take it out or disable it so I'll make a note of the issue and pass it on.