It only appears on the side, but not on the top. Sorry if this ‘surface’ thing is outdated, I just need the classic look. The studs appear normally on spheres.
Is this a regular Cylinder Part, or a Mesh inside a Part, or a MeshPart?
Either way you should be able to set all 6 sides to Studs.
Or find a Stud Texture and apply it to the Left and Right sides (the flat sides) of the Cylinder Part.
Have a look at the Properties window of the Cylinder when you have it selected in the Explorer window. It should tell you how the Cylinder is set up.
On the ‘surface’ option in the properties window, it states that all sides are studs.