@belghast I know you can export toots and who you follow, and last I checked you could import who you follow into a new account.
You CANNOT export/import who follows you, as that would open up a world of abuse possibilities from people messing with the API to force you to follow them.
@noelle might be able to provide more specific info as she's running Elekk on a fork of Mastodon so there may be features I'm not up to date on.