Most climate scenario modelling to date does not incorporate increasing variability nor the use of storage, a critical tool to manage variability. Two recent studies are exceptions. In one, climate change generally reduces mean yields and increases their variability in the Midwestern USA and causes modest increases in price volatility . A second study  focuses on maize net importers across Africa, Asia and Latin America during 2000-2015. A 1% increase in the ratio of imports to total consumption reduces domestic price variability by 0.29%. A 1% increase in stocks at the beginning of the season is correlated with a 0.22% reduction in the coefficient of variation.
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report