OH sorry I read your comment too fast lol. For that I used lemmy migrate on GitHub, I have about 5 accounts across different instances and they all have mostly the same communities subscribed. I just go in and resync if I’ve subbed to any new ones lately, and it’ll tell you which ones don’t sync (like if one’s defederated or blocked or something in other instances).

Just always be careful before throwing your credentials willy nilly into tools like this https://github.com/wescode/lemmy_migrate

Edit: I see the other guy responded with lasim which I’ve also heard is good