I thought most of what’s for sale in a typical supermarket now in Europe or America is more or less on consignment anyway, and manufacturers sign complex agreem

I thought most of what’s for sale in a typical supermarket now in Europe or America is more or less on consignment anyway, and manufacturers sign complex agreements with store brands regarding shelf placement, height, length, and price. How much do retailers actually control the price of what they sell, except their own brands and bulk produce?