Some things affect prices directly, others take a longer time. Just out of curiosity, at what time can we agree that if the egg prices are still higher than under Biden you all got played by a con man? 2 months?
You're being intentionally obtuse in a desperate attempt at getting a "gotcha" against Trump where there is none. Iirc, he never promised to bring down the price of every single grocery item. I'm not even sure if he made explicit promises to bring down nominal prices.
What he did promise, and what his voters expect, is increased purchasing power/real incomes, i.e. their income outpacing cost of living. Doesn't matter how we get there. If prices increase by 10% over his 4-year term while incomes go up 20%, voters will see that as a success, not a failure. And based on his energy policies which are geared toward increasing supply, there is reason to hope that he will indeed be able to bring down some nominal prices, too.