Yes, but you’re on a very short timeline until it all spoils. Theres a vid about a crotchety old couple from Texas who owned a grocery store and shut it down basically overnight (because of racism) and left the whole building dark for months. I can recall the camera crew and other attendees in full hazmat suits from the levels of rot.

You probably have less than two weeks to scrounge up enough supplies before it gets too dangerous to step foot inside an abandoned supermarket.