This one is probably either small enough to fly under Disney’s radar or has already been shut down. Disney successfully copyrighted one Club Penguin revival project for using the art assets and logo, even though the code was completely rewritten. Maybe this is the one?
Is renaming the instance domain without reinstalling Lemmy related to changing the WebFinger query? It’s the trick some instances use to have a different instance domain from their username domain, like @user@domain.com while the instance is mastodon.domain.com.