Thank you for adding the sub forum option. It is a great addition for me.
What I've found is that the description of sub-forum isn't displayed in the category page.
It is displayed after entering the forum.
In addition, I think that sub forum displayed name should be indented and the same font size as the parent forum.
Colors index:
Green border - admin page
Orange border - forum page
Purple - main forum name (Travel)
Blue - sub forum name (Tips for travelers)
Red - on left is the description and on right the missing description.
Black - Topic (Leisure)
Thank you
All is correct. This is the classic forum design. Subforum descriptions can not be displayed on main forum page, you can't show so many information under a one parent forum, it'll not look good and it'll not be user-friendly. The subForum title font-size should be smaller than the parent forum. I hope you have a minimum experience with forum platform and you have seen this on all popular forum platforms like vBuleltin, phpBB, XenForo, etc...
Thank you, got it.
Like zoom-in zoom-out when you hide or revile info.