I don't think so? Gas tends to move up in the pouch so maybe something is happening farther up and you can't push it down and out. Dilations didn't help my issue or at least not for long because my issue wasn't strictures. I don't think dilations will help if there is a ton of inflammation from straining either. I can't imagine doing one without anesthesia if you are already struggling! I had the needle knife procedure for two strictures (after I was perforated during a dilation) and banding to support some prolapses. Your gas issue sounds suspiciously like my prolapse issue. I could poop at least a little at a time but I couldn't pass gas. It was because straining deformed my pouch and kinked it so I could never empty it completely.
But seriously, if you can't get something done soon, look into the catheter to help out until they can do something surgical to help you. I went from being on and off prednisone and on a liquid diet to being able to feel normal except for in the bathroom. After my banding, I can go normally but I still use the catheter to make sure I don't strain and to help me empty my pouch more completely at night (no trips to the bathroom at night now!). The catheter can keep you functional until you can address whatever is happening. You don't need a prescription for them unless you want to bill it to your insurance.