Whatever the devs can do now is only provide a local only solution if possible, because there is no support for it in serverside. So whatever u save, they will not be synced.
There is an open issue ticket in lemmy's main github repo and are actually happening quite lot of conversations on how to implement it
I'm going to take a stab at it for the next update of Summit for Lemmy. Current update being worked on adds mod actions. I'll look into multi community after that update.
Even when I would want this right away I think the best option is to wait for Lemmy to add it to their backend, so the apps can work with it and not split resources between all these talented people... Unless it's something easily doable ofc.