Lemmy is entirely federated with mastodon now. there are many issues still but you can look up a lemmy community by @communityname@lemmyinstance.domain from mastodon and follow it there and then you will recieve all posts from that community in your home feed. if you want to reply to a spesific lemmy post from mastodon (broken on instances running 0.18 but working on earlier versions) you can copy the link from the little rainbow fediverse icon on the top of the post and search it from mastodon, and it will load internally and then you can respond from there.
Lemmy is entirely federated with mastodon now. there are many issues still but you can look up a lemmy community by @communityname@lemmyinstance.domain from mastodon and follow it there and then you will recieve all posts from that community in your home feed. if you want to reply to a spesific lemmy post from mastodon (broken on instances running 0.18 but working on earlier versions) you can copy the link from the little rainbow fediverse icon on the top of the post and search it from mastodon, and it will load internally and then you can respond from there.