I made a script that “transfers” your reddit subs to lemmy by searching for communities with the same name and joining them.
I started working on this when I moved my main account/traffic from reddit to lemmy and with the help of some people I improved it and fixed some bugs.
It’s the first and that’s exactly what I’d need, thankyou! :)
Did you figure out everything you needed? If not, let me know, it would be fairly easy to incorporate your multireddits in my script :)