Lemmy.ml has now blocked Threads.net
I got like 150, that wouldn’t stop me. Plus you can use curl to export the list of the instances you’re subscribed to on your account.
There are some tools in the plugins section on sh.itjust.works: !plugins@sh.itjust.works.
https://lemmy.world/post/1171660
This is a tool with a GUI that does profile migration. You can use it in Windows and Linux. It migrates almost everything, including subscribed communities.