Are you sure? Your link also lands me at an auth required splash page.
I know exactly what you're referring to those "content hovers". Like the substack highlight, sign up overlays on immediate visit, or upsells in shopping cart flows.
The link in the OP doesn't have that option.
The provided link of https://m.facebook.com/story.php?story_fbid=1015993413146151... redirects me to https://www.facebook.com/login/?next=https%3A%2F%2Fwww.faceb... which is a hard auth page. No modals, no pop-overs, no X / bypass on the redirected page.
I tried the archive.is for content a work around on the share link, also didn't work.