You need a stout version of the tap, and if it doesn't say stout, it's not a stout tap.
The Celli FC4 comes in a stout version, but the cheaper Chinese-made one does not, at least not that I'm aware of.
Alternatively can use an old Guinness/Beamish/Murphys etc tap, and you can buy an in-line flow control valve as those taps don't have them.
(An in-line flow control valve isn't a normal on/off valve, which will just cause foaming. The FCV has a bullet-shaped restrictor inside it)
Bear in mind anyone looking for a stout tap really should have a mixed gas bottle and mixed gas regulator. I think you can drive a stout tap on CO2 alone, but afaik the results aren't 100%, and you really need the mixed gas setup.