If prices are artificially capped below whatever the “fair market price” is, there will be less of it. Is that enough to cause hardship? Who knows. Many of us do recall only being able to buy gasoline on odd/even days that corresponded to the car’s license plate.
Maybe the grocery stores can play games, like hold the line on one thing that’s regulated (say, eggs) and try to profit on something else (ham, bacon and sausage). Or maybe they’ll have fewer employees working…but that might already have gone as far as it can go with the availability of employees right now. Have you tried to get help in a store lately?