In my opinion, it has a big scope in Pakistan. People are getting more and more busy everyday, which gives them convenience to shop from anywhere and anytime. However, that doesn't mean it is the downfall of traditional grocery stores. Both will keep shining in their individual charm.
Online grocery shopping always a good idea and many retail store in NA are adapting this feature.
Problem in Pakistan is security and fraud, However, services like online gifts/food delivery and Uber/Careem proving it to be wrong otherwise.
These services have been running successfully in Pakistan, therefore, online grocery shopping can also turn out to be a good business pretty soon.