Communities on different instances about the same topic should have the option to essentially federate so a post on one appears on all of them and opening any of them shows you the comments from all of them. This way when lemmy.world is down its not a big deal because posting to any news community federates to all of the communities instead of barely having people see your post. Federation could be decided by the community mods and the comments can have a little “/c/communityname@instance.name” on it so you know which community the comment was originally posted on.
If communities have agreed to federate with each other, mod status should federate and mods of any of the federated communities should be able to moderate any content.
If it’s one way (e.g. !technology@lemmy.world absorbs content from !technology@lemmy.ml but not the other way around) then the absorbing instance lemmy.world can moderate all content but it doesn’t federate to lemmy.ml.
i can’t decide if a one-way-moderation-scheme-type-thingy like that is beautifully simple solution, or one fraught with annoying hidden complications lol that’s a sick idea.
I think it would work if you didn’t overcomplicate it.