People generally miss fundamentals and don't account for a moving store of value, they often assume its constant. Economics is marginally only used to sell something often with deceit in mind on someones part.
As for what's driving inflation, its obvious its the fact that government is spending more than they have each year, printing the difference, and have now gone gangbusters with manufacturing spending to offset china imports.
They are also printing money to buy back bonds to control yield curve in lockstep with other central bank currencies (you see these fluctuations in the relative value of the currency).
The corruption, fraud, and graft that this money is funneling to have become so large that its inflating the dollar as its not necessarily creating economic activity. Rising interest rates have stressed the already overleveraged companies to the point they are shutting down or massively laying off.
Some producers base their prices off a business as usual approach. Others project profit sufficient to normalize against changes in the currency price level and any additional expenses/shortfalls in supply chain problems during the short term. While prices may be inflexible for some things, that's only if there's no shortage and the product is available.
Also, you have distributors refusing to do business with smaller companies (as has been seen with a couple of the small time farmers). They want shortages, so they can have an excuse to charge more. Classic characteristic of stagflation and lack of antitrust.
All of this can only get up to a point before food becomes relatively unavailable, and then everything hits the fan.