[Solved] Forum Topic Display
There are two specific options in Forums > Settings > Forums admin page. You can set Recent Topics opened/collapsed by default and set the number of recent topics displayed under each forum panel.
Please read this doc: https://wpforo.com/docs/root/categories-and-forums/forum-layouts/extended-layout/
I'd also suggest you check out the wpForo threaded layout. More info here: https://wpforo.com/docs/root/categories-and-forums/forum-layouts/threaded-layout/