Interesting post, brings back memories of Babri Masjid incident....
Heres the deal:
Back in 1992, the larger hypermarkets in the UAE were typically owned by Sindhis/Gujratis - Maya Lals, Choithrams. And yes, they were part of an unofficial boycott....
Now in 2019, Lulu is possibly the largest hypermarket chain but its owned by a Keralite Muslim ....
As for restaurants, its quite rare for Pakistanis to eat at Indian eateries in the Gulf
The ones where they do eat and the Indian groceries they do shop at, are almost always owned by South Indian Muslims, who have always taken a passive, peace-ish stance during Indo Pak conflicts such as Kargil and now as well...
So there wont be much change, at least in UAE, don't know about other places