“City of London” is the really small (like 2 square mile) area in the middle though isn’t it? AFAIK barely anyone is resident there so it might make sense if employees got to vote.

it can’t make it impossible. If facebook sold data to amazon, so now amazon has a copy, and then facebook’s user asks their data to be deleted, facebook can’t just march into amazon’s servers and delete the data themselves. The best they can do is send a formal notice to amazon requesting it be deleted, which sounds like what lemmy does. At this point it’s up to the federated server if they comply with the law…