If you’re just trying to stock up now, you’re a little late.
Most smart people I know have 3 to 6 months of food stored up. Dried, canned, preserved, MREs, Freeze dried camping food, raw staples (flour, sugar, baking powder/soda, spices, yeast, etc).
Look at alternate sources to grocery stores. Walgreens, RiteAid, CVS and other drug stores usually have a small grocery department. While they don’t stock a lot of quantity or selection, it’s usually restocked pretty regularly.
No milk today at my local Walmart in northern VA. 2 days ago, no pork.