Not in the app but here are two tools for migration by Emotet and elvith.
https://stablenarwhal.github.io/Lemmy-Userdata-Migration/
Features:
- Export user data from any Lemmy instance (>=v0.19)
- Download user data as a text file
- Modify user data, e.g. to add or remove followed users/communites (Example in Wiki)
- “display_name”
- “bio”
- “avatar”
- “banner”
- “matrix_id”
- “bot_account”
- “settings”
- “followed_communities”
- “saved_posts”
- “saved_comments”
- “blocked_communities”
- “blocked_users”
- “blocked_instances”
- Transfer user data to the target account on the target instance
https://elvith-de.github.io/lemmy-migration/
Features:
- Login and export settings from any Lemmy instance (e.g. feddit.de)
- Optionally: Find local communities on the target instance that match followed communities
- Optionally: Backup your settings to a file (can be imported on any Lemmy instance in your profile)
- Login and import settings to any Lemmy instance (e.g. feddit.org)
I used it. It was a nice idea but at least for me it got really weird over time. The pics I got were mostly blurred messes. Maybe it was an error on my side but it kind of spoiled the fun after a while.