Interesting to see Lemmy from the perspective of a Mastodon user. I never used Twitter and I have no interest in Mastodon, but it certainly seems like a tremendous advantage to be able to cross pollinate with them, given their sizeable userbase. There is definitely more work to be done on streamlining federation between platforms, but its an inherently tricky problem so I’m not surprised.
Lemmy/Piefed/Mbin are still at the stage where they are trying to complete their own core features, so there hasn’t been as much focus on bridging to the rest of the fediverse. Mastodon is a more mature software so they probably had more time to work on extra features like cross-platform federation.