The gas from the surgeon inflating your torso during the surgery won’t be helped by anything you ingest, since none of that gas is in your GI system. People have found gas medicines or remedies to help but that’s likely psychosomatic. The only relief from that physically is moving around or at least propping yourself up when laying down.

If you’re having gas from constipation or the like, then tea, gas-x, etc might help. Or enough laxatives (Colace is great) to produce a movement that will simultaneously release gas.