Here's evidence of what I observed myself - Facebook is throttling down reach for links and gives more circulation to image posts. Although, admittedly, it's quite extreme in Babylon Bee's case.
I have seen it time and time again - FB wants people to stay on its site and not click away to whatever you may be publishing, even if it's your own website.
I think it also detects links in text and image based posts, throttling them too.
