Is this from your Enterprise view or a report? If you're looking at Enterprise -> Update Services -> <Your WSUS Server> if this information is not getting updated it means your machines are not contacting WSUS.
If this is a specific report (and you can let us know which one) then it's likely an issue with Inventory. That could still mean your machines aren't contacting WSUS, or the Inventory is timing out, or a few other things. If it is a report, you may want to check your Task History to make sure that your WSUS Inventory is completing without errors and work outwards from there.
Enterprise view. Haven't checked the reports yet. The machines are definitely contacting WSUS as they are patching. I just tried a few things and it turns out you must select the option:
- Approval Summary - Calculate approval Summaries
Once enabled these columns show correctly