What Upgrades are being referenced as NEEDED by the clients?
Look at the Upgrades View (If you haven't created one, use my guide https://www.ajtek.ca/wsus/how-to-setup-manage-and-maintain-wsus-part-2-computer-groups-update-views/ to create the view)
Then look at Updates that have the approval of 'Any Except Declined' with the status of 'Failed or Needed'
Then approve those (uses the approvals method from Part 6 https://www.ajtek.ca/wsus/how-to-setup-manage-and-maintain-wsus-part-6-selecting-your-test-systems-the-approvals-process/)