Bob, did you mean NOT every Wonder Kitchen had a combo?
No they did not just like not all of them had the wall mounted refrigerator-freezer. There were component appliances that could be chosen for inclusion depending on space and layout.
The only things that were common to all were the sink cabinet, dishwasher, and countertop with sink and cooktop. Some had wall ovens instead of the 24" range (later models 30"). I suppose they could have been ordered without a dishwasher, but haven't seen one. I don't think they were stock items, but rather were assembled to order.