This tool lets you migrate your own posts from any subreddit to any Lemmy community you want, I made it because I couldn’t find anything else that did it the way I wanted to. I’m super happy how it turned out, I managed to get 9 years worth of posts over this way…
The GitHub link shows how to use it in case you want to!
I totally agree, I just wanted to keep my posts because they mean a lot to me, I used it on my own community which at the time was empty as I just moved to lemmy.
I was a bit excited after making this, and will update the Readme with a word of warning!