To output stepover in shop docs, you need to understand that is is not just a variable.
At last count, we have 14 different stepover options in milling. First, you need to know what option (constant, scallop, etc), and then look for the variables approriate for that option. For example, if the value is 50, you need to know if it is 50 mm, or 50 passes, or 50 %Tool.
There is an ER to define the simplified display you see in the Operation Navigator column as a mom variable - you can ask GTAC to add your name to that.