I know things are a bit different there - with regard to food - but when we were in lockdown earlier, my friends and I (and presumably others) made a point of gathering ready made meals from our local restaurants and pubs. Put them in the freezer then used them later at will.
It is so important to support good locals. We all want them still there and our communities to be vibrant, when eventually this thing calms down.
I think you are being very smart to not patronise shops who don't support their locals.
That is so great! Our city council converted a stadium into a massive food bank. They packed thousands of free food parcels for anyone who needed them. And delivered them to vulnerable people who couldn't leave the house to pick them up. I was really proud of all those businesses that donated food for the effort.
Something else that really warmed my heart was my local supermarket has a wall where cards, letters and artwork are displayed, thanking the essential workers for their tireless efforts to keep us safe.