[Solved] What is this forum type/ template called?

No particular reason for asking, but I'm about curious the name of this forum template I've been seeing a lot lately (saw it around six months ago the first time). It's basically a linear forum template where there is a timeline on the right side of the site. You can interact with it. 'Template' is probably not the right word, but you get the idea.

Examples: Logseq's forum uses it and so does Anki's forum.