It doesn't look like anybody put a lot of thought into it yet. Look at the title of your post on any Lemmy instance, at least where I'm reading it's just the first n characters of the text, cut off in mid sentence. Fortunately it's a work in progress!

The fact that there is some kind of federation is pretty cool but I hope Fedi devs at some point will have the time to implement better (and better formatted 🙂) communication between different instance softwares. It would suck if Lemmy sites just became a sort of red haired stepchild of the larger Fediverse.