Since the forum has relocated, we've lost a feature in the Tapatalk realm. For subscribed sub-forums, there is a page that lists all you have subscribed to and you can tap on the entry and view the top of that sub-forum.
On the "Subscribed" page, to the left of each sub-forum name there is a circle with a checkmark in it. (see my attached screenshot) Before the forum moved, the circle/checkmark would be blue for any sub-forums that had new/unread content. Since the move, the color remains gray.
I have no idea what might be involved to repair this. I know the feature still works on other forums. And yes, I know that the plural should be 'fora'.