This is not perfect, but it will help.
Go to a forum. In this example I am using the Health Forum. Find the "Replies" at the top of the thread list. Click it twice.
The unanswered posts for that particular forum will come to the top of the list:
Go to a forum. In this example I am using the Health Forum. Find the "Replies" at the top of the thread list. Click it twice.
The unanswered posts for that particular forum will come to the top of the list: