My crazy experience in Austria was that one was unable to buy plastic forks. Packets of plastic knives were still on shelves, but the forks had been removed. I thought it was random luck, but three large supermarkets were the same. I guess they really didn’t want people eating at those forbidden gatherings.
Seems more likely that they were just in short supply. Plastic forks always sell better than other plastic cutlery. I don't think there's much panic buying of plastic forks but it's the kind of item they probably weren't in a hurry to restock when there's a massive run on toilet paper and pasta.