Maybe examine the societal issues that would make someone order groceries rather than walk for them, if physical disability is not the barrier.
Individual stores can choose to do delivery, it was common for chains like Eckerd[1] in the 90s but I didn't know many people who used them unless they were really old and wanted to get their prescriptions plus a few things delivered between visits from caregivers rather than go into a home.
My mother would be happy with such services. But I’m afraid this type of a client is too small of a niche.
Where I live there is one squeezed in between three normal supermarkets, each with long opening hours.
There doesn't seem to be any viable business plan for these shops, which is what the article hints at.
https://gorillas.io/en/blog/a-message-from-co-founder-and-ce...