Target has a pharmacy and a full grocery section. Walmart is as much a grocery store as it is a department store. If anything, they lucked out with being deemed essential simply because of their grocery sections.
It’s unfortunate for the old lady who had to close her business. I had to close my business too.
But, if I had a shop that sold goods, when i closed it down for Covid-19, I would have put a sign on the door with my contact info that I can take orders over the phone or email giving my customers the opportunity to be loyal and supportive.