Are you calling the server list on joinmastodon.org “the federation”? Because it’s not; it’s literally just a list. Nothing about the list tells you about any actual federation between instances. Without a doubt there are instances on that list that are federated with ones not on that list and vice versa. It’s not even the only list out there.
This would be a good thing, though I think it’s trickier than it appears:
How arbitrary are “best before” and “expires on” labels and how do they differ from food to food?
How do the labels themselves differ from each other and how to do they differ from jurisdiction to jurisdiction?
Could acknowledging that “expired” food is still good cause expiry dates to just be extended? How far could they be extended before food actually is dangerous past the label?
How does liability work when someone gets sick from “expired” food? Does it change when it’s part of a structured donation system?
Lots of comments already telling you to stay home so I don’t think I need to. What I will say is if you don’t want to contribute to the growing number of variants, you’ll stay home. Variants largely arise from mutations in the virus during replication. Humans are virus-replication machines. If you’re infected you could be carrying a new variant right now and the only way to stop it is to let it die inside you. Your body’s immune system will already be in full swing and be in the best position to deal with it as opposed to an uninfected person.