That is correct. Anti-gas products were not made for j-pouches, but they weren't made for colons either. They are made for gastrointestinal gas. The pills don't care if you have a colon or not, particularly since that is not where they work primarily (if they are going to work).
Same with digestive enzymes like Beano.
You just have to experiment. There really are no "pouch specific" medications.
Jan