This is going to be a supply chain disaster of epic proportions. The shooting and fighting is far from the most destructive part of this war. Russia is a massive exporter of fertilizers and both Ukraine and Russia export a lot of food. Food prices were high already before the war. Start your own preparedness. Fill your pantry with stuff that you usually consume. Unlike preppers you don't have to buy stuff to provide you with all your food, just buy a major supply of cereal, flour, rice and pasta. Those types of goods will become expensive.

I am very much into gardening, and supplies used in May here in Scandinavia are already selling out. There has never been such demand. I know the local sellers of food gardening supplies and they are not hit too bad by the supply chain crisis, instead they are facing insane demand. If you have access to land plant potatoes. They are healthier than wheat and planted potatoes are cheap. You don't have to own land, just ask around and you will find a plot. If you have a large garden you are less impacted by food prices. Hunting, fishing, beekeeping and berry picking are other hobbies that will provide you with food.