I have Campagnolo 12 on my KICKR, I ran it as an 11 for a long time with a Shimano cassette, and then switched to 12 when I reset the old Colnago as a trainer bike. (i know how silly that sounds…).
I mean if you only plan to use ERG mode, it doesnt matter if you run a Campy or Shimano cassette, but it wont shift cleany if you plan to use the derailleur obviously.