I'm so used to social media automatically processing the URL in a post to show a sneak peek of what's in the link (either in a form of a post snippet or an image). Almost every other social media I've used does that. For a test I pasted a Wikipedia link at the bottom of this post.
I haven't tried it with other federated social media like like Diaspora and Friendica but if I remember correctly Pawoo (a Mastodon instance) processed a Pixiv link; I'm not sure though if it's Mastodon's built-in capability or because Pixiv did something in integrating with Pawoo. Minds.com (open source but not a federation) also have this capability. https://en.wikipedia.org/wiki/Wikipedia:Why_Wikipedia_cannot_claim_the_earth_is_not_flat