I’ve seen a few comments in the other thread about community centrization
Your following, blocking, muting, and domain-blocking lists can be imported at Settings > Import, where they can either be merged or overwritten.
Mastodon currently does not support importing posts or media due to technical limitations
https://docs.joinmastodon.org/user/moving/#export
Seems pretty similar to the way we manage it with Lemmy at the moment (settings menu, export JSON, import JSON), am I missing something?
It seems to be a different question than migrating the content.
We moved !casualconversation@lemmy.world to !casualconversation@lemm.ee, but the content of the old community is still accessible for everyone.
This has more to do with the instance hosting the former community still being available than migration of the content itself