I’ve used lemmy_migrate in the past and it’s good for one-way copy. I’ve also seen lasim, but I haven’t tried it. You may find other options on awesome-lemmy.
This looks excellent! Thanks for your work building it!
Could you share what your favourite features of Infinity are? I’ve never used it before, here or on the old site.
The developer has just announced that Relay will continue to function and will switch to a subscription model, so there probably won’t be a Relay for Lemmy, unfortunately :(
He claimed he DMed the admins. I can’t see any public post about it.