Variant Printing in Schematic from Output Job

Solution Details

Selecting the [Project Physical Documents] in the output job will show the compiled sheet of the schematic. Including the different variants for the sheets. 



The term "Project Physical Documents" refers to the physical or compiled view of the schematics.  When setting the Data Source for the Schematic Prints output, All SCH Documents relates to the printing of the set of all logical schematics in the project (the raw, uncompiled "Editor" view of each schematic).  To print the set of all physical schematics in the project (the compiled document view(s) of each schematic), be sure to set the Data Source to [Project Physical Documents].

Here's documentation with more detail:
https://www.altium.com/documentation/altium-designer/preparing-multiple-outputs-in-an-outputjob-ad