I noticed this posts doesn’t link back to [email protected].

Cross-posts on Lemmy work by detecting whether someone has linked to the same thing, so to allow people to find their way to the original post, you can simply copy the image URL from your first post and re-use it in any further posts instead of re-uploading the image.

Clients that support it will then show “also posted to” and link to the other communities to which something has been posted, allowing people to discover other communities they might like through the posts on communities they already sub to.