

IIRC, when the URL (on the Mastodon side) is the first line, it pushes a text URL as the heading in Lemmy.
Image attachments work too, if you’re only using images.
The issue is you can’t have a Lemmy URL, a text heading and a custom thumbnail image in a single post.
This creates problems if you have both a Lemmy community and a Mastodon account and you want post only from the Mastodon account (with the post also going to Lemmy).
I spent a lot of time experimenting with this and I couldn’t find a good solution. I stick to posting to Lemmy and Mastodon using separate accounts.
This is the kind of stuff that proves that the american oligarch regime has gone full on degenerate.
It will take very strict and no bullshit rehabilitation and justice procedures to cure them of their degeneracy.