I think the comedy value arises from those trying to draw some conclusions about Brexit as a result of those photographs or from remainers on Twitter appealing to followers to send them pictures of empty shelves (an odd fetish).
I fully expect shortages to be worse next week. Tesco’s biggest distributor has got most drivers sat at home self isolating: There is a Labour shortage. Firms refuse to pay the new rate for the job. Oh, and we are in the middle of the worst pandemic in living memory. The miracle - thanks to the thicko Brexit voting workers who work on the roads, in the distribution centres, labouring on farms, the food processing workers and in the supermarkets - is the absolute range and quality of food still available and which has been since March 2020