There's one I use in Swansea that has an amazing range of fruits and veggies that I don't recognize and have to look up to find out what they are and what they're good for. Obviously, they're not local but exotic, so they're being flown in to satisfy the tastes of people who come from those parts of the world, now live here, and miss fresh home seasonal foods. And unless I dig a lot deeper, I don't know how they're produced where they come from; I just know they're not part of
our industrialized food system.
But I wonder if, despite being flown in, their carbon footprint is actually bigger than that of home grown industrial fruit or veg, and I suspect it isn't by the time you factor in all the seed manipulation, fertilization, spraying, storage, packaging and transport that goes into supposedly 'local' foodstuffs. A worrying large number of people don't even know which foods could, never mind do, actually grow here, and which couldn't and aren't.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7116398/