

I think it’s worth trying putting the link in the post body. Mastodon might generate a preview image with it.
Another option would be creating the posts on mastodon, and mentioning the lemmy community. The KDE community uses this method for their announcements. Example: https://lemmy.world/post/27768851
Original link: https://www.schleswig-holstein.de/DE/landesregierung/themen/digitalisierung/linux-plus1