I packed a box of all my post surgical needs so when I got home from hospital I had all I needed & wouldn’t have to leave the house to go shopping. Just off the top of my head:
Over the counter meds: non NSAID pain meds like tylenol, gas x, stool softener, Imodium.
A variety of shakes, broths, soups, yoghurt drinks, etc. protein water & any other allowed ‘foods’. Post surgery, your taste buds can go a bit haywire temporarily & flavours you liked before may taste awful. So that shake you enjoyed may be disgusting: too sweet, too salty or just blah!
Electrolyte drinks like Hydralyte.
Some are given their post surgical med scripts before surgery. If so get those scripts filled before your surgery too.
All the best.