The Count of catalog items is missing next to Categories on Service Portal sc_catagory page.
Kingston and later releases
From Kingston release by default, the badge of categories is disabled ("Omit Badges" Instance Option is checked for the Categories widget)
To resolve this, please follow the steps outlined below:
1) Navigate to the page where the numbers are not showing
2) Place the mouse over the Categories widget, hold CTRL and right click the widget
3) Select "Instance Options" from the context menu
4) Uncheck the Omit Badges checkbox and click the Save button
The numbers should now appear as expected.