You can track training for leaders in the Windows App under Leaders > Training History. You can also add your own custom training items. Go to Admin > System Settings > Generic Lookups and select the Category of Leadership Training on the left. On the right, add the item's Description (like "Mandatory Reporter Training"), the base club (use 'Awana' to apply to all leaders), and check that it is required.
These custom training items will then be available in the list of options when adding a training item to a leader's record.
To quickly add these records to all of your leaders, use multi-select in the Leader's grid along with the pop-up menu item of "Add Leadership training record".
