I don't even have my Kemper yet, but as far as I can tell from the manual and other sources, it doesn't have this feature. Correct me if I'm wrong!
When using the harmonizer in the post-amp position, it would be great if we could adjust the stereo position for the different voices independently. E.g., dry signal on the right, pitch shifted signal on the left.
I can currently do this on my GT-10, which can run two separate channels simultaneously in its effects chain, by splitting the channels (amp A and amp B) left and right, and applying the harmonizer (with only the wet signal) to one of them.
It would be cool if the Kemper could do this as well. I'll be running a stereo setup and even a slight separation of the harmonized voices -- not necessarily hard right/hard left -- would sound very neat, I think.
Edit -- I just realized it may not be that simple without running two separate amp sections, because you want the harmonizer before the amp in the effects chain, of course. Oh well...