>>124890703It's pretty broad with a lot of variation, but usually each thread is a "quest", which is basically like a cooperative/interactive game similar to Dungeons and Dragons.
Again it varies greatly between threads, but there's usually a QM (the OP of the thread) who writes/draws/both the situations, scenes, and plot of some story they've created, and any posters who are interested participate in the thread by posting. There might be a main character or several, who are controlled by the collective player actions, so it's like a cooperative narrative game.
In this specific regard, Amphibia got /qst/ thread for a quest about the show, which seemed pretty neat and the Amphibia threads seem proud of and repost on occasion. So if they got one, at some point or other Owl House should have one.