They're not official ULX commands, but rather XGUI commands that have chat equivalents. They've been there even since XGUI was integrated with ULX about 5 years ago.
But yes, if you have access to "ulx ban", you'll have these 'helper' commands. The most useful case for this is to immediately freeze a troublesome player and give you the option to enter ban reason and duration, rather than banning first, filling in details later., e.g. '!fban stickly'