What do you always have on hand? Why?
I’d count refrigerated items as pantry staples if they keep for longer than a couple weeks.
One recent addition to my pantry has been dried chillies - great base for red chile sauce for enchiladas. Those plus maseca and some beans (also both staples) and I have a base for amazing enchiladas or tacos or whatever.
I make it and can it myself! Otherwise it’s sometimes next to the jellies and jams at stores, or can be bought at farmers markets like where I get the apples to make my own!