fats slow carb absorption in the small intestine, but I don’t think it delays emptying of the stomach. If the valve is shut to the point of stopping oils leaving. The salad would have been worse. With my father, the next step is peg feeding and bypassing the bottom valve… Depending on the Dr, I’m getting conflicting info on nasal tube being long term. Hopefully peg or nasal feeding is a ways off, or other health events makes the decision redundant.
you may find higher protein will put on weight better than fat, that seems to be more for energy.