As already noted in the thread on our being defederated by lemmy.world, we are now refederated for the time-being. However, as noted by one of the l.w admins if there are any spamming issues we'll be back out again and if the upgrades stop we will have trouble with federation (lemmy.one is still not on the latest version, while we are), so there is still a need to sort this out.
There is a recent change in Lemmy's 0.19 release which would allow the import and export of user profile data, which in theory could allow easier migration between servers.
https://github.com/LemmyNet/lemmy/pull/3976
Hopefully we won't have to resort to that. Also, it would require the admin to upgrade to Lemmy 0.19, which may not be guaranteed.