We haven't been to any supermarkets for over a year. Just before lockdown - in January, the nearest supermarket - which is some distance and not very big, more of a corner shop - had some issues over toilet rolls, tissues and some fresh produce. Our deliveries now come from some distance away and last time there were strange things missing. However, we're vegetarians and our pulses etc come via an on-line shop in any case so that hasn't been an issue. Flour and yeast were problematic but I now buy that from an artisan mill. We gave up trying to get fresh milk - it would have been difficult without Covid and we now buy dried milk directly from a vending machine company! We make it up in milk bottles and we've got used to it. What we hadn't been able to get for well over a year was butternut squashes but a couple of weeks ago they became available again. However, we grow stuff and we have a really good pressure cooker. I think it depends where you are and how much you already got online. It also depends on how much you usually have in store. I think some people have been hit really hard by it all and some don't have the financial resources to buy equipment (breadmaker, pressure cooker, slow cook, yogurt maker etc etc) which all help to overcome the deficits. And food prices have risen - at least here they have.
We didn't have any deliveries here for the first month. I was on the extreme risk list but that didn't work in my case. I fell out with the supermarket I'd been with since I was 40 over what happened during lockdown because I know that whatever discomfort I felt, many more people were at lot worse off and didn't have the resources to fix the problems. Lockdown hasn't been a trial for us. We have land round us and the house was a wreck so we had plenty to occupy our minds. However, for a lot of people it has clearly been extremely difficult. It has also been extremely unfair. And as I say, they don't have the financial resources to act as a buffer.
We didn't have the use of a car until a few months ago either which got us into the hole in my bucket scenario. Again, I assume for people without their own transport, who were a distance from shops it must have been hellish. Do you use petrol risking the shops and find nothing you want there or what? Some of us have got off pretty lightly. Others haven't. It depends.