When you notice Lemmy is quieter than usual, then have a look at the Lemmy.world status
Seems like they are under attack again, will those people never stop? I feel sorry for the admin team.
how? I just use Sync for Lemmy and it seems like everything is down when lemmy.world is. I don't really know how Lemmy works, or where different things I subscribe to are based.
Your account is on lemmy.world, so it fails to get any and all data. Accounts on other instances can interact with historic data.
You have to think of lemmy.world as your lemmy provider. Just like with e-mail you have your own email provider from the ISP, or gmail, or ... If your own provider is down, you can't receive or send mails, but all other people can send mails to each other. It's the same with lemmy, but then for reading posts and send comments to that instance/provider.