Later on when you successfully sign up on a different Lemmy instance just go into your new user’s profile settings again (exactly how you just did for https://lemm.ee/settings but it’ll be [YOUR-NEW-LEMMY-INSTANCE]/settings, in there under “Import/Export Settings” look for the Import section and there you can import the file you just exported.
Later on when you successfully sign up on a different Lemmy instance just go into your new user’s profile settings again (exactly how you just did for https://lemm.ee/settings but it’ll be [YOUR-NEW-LEMMY-INSTANCE]/settings, in there under “Import/Export Settings” look for the Import section and there you can import the file you just exported.
PS - For a quick overview of Lemmy instances you can check out https://lemmyverse.net/?order=active&open=true and/or https://join-lemmy.org/instances