trouble subscribing to covid chapo community from lemmy.ml

Not sure if I'm posting to the right place since I think this is a lemmy.ml federation problem. I was subscribed to c/covid@hexbear.net but hexbear renamed itself to chapo.chat, so updates are now going to c/covid@chapo.chat. I try to subscribe to that from lemmy.ml and it says "community not found". I can view it directly on chapo.chat and while it's low activity, there is at least 1 newer post there than on .ml's feed of hexbear. Help?