What you see on the #Fediverse really depends on what software you're using. Compare the following screenshots of the same blog post published with the ActivityPub protocol.

In the first, the post is ...sort of rendered in mostly-vanilla #Mastodon. The title (in plain text) of the blog post is followed by a link to the blog post (which my installation renders with a card preview). That's it.

In the second, which is a lightly modified #Hometown installation, the full blog post is rendered in full, with embedded images and formatting conserved.

Link to the post (which you'll have to copy-paste into your search bar most likely): https://blog.millefeuilles.cloud/maj-de-mille-feuilles-a-la-version-0-5-5-de-bookwyrm — what does it look like in your feed?