i think this can be good as solution.... discussion title, post count and users that have posted into the discussion.
desktop view:
![](https://i.ibb.co/6mgFW3H/suggested-desktop.png)
mobile view:
![](https://i.ibb.co/QCD1gsb/suggested-mobile.png)
in admin settings you can set the number of discussions to show, but i think 15 can take a lot of space, but its possible, maybe with some css tweaks.