If your managers cannot see the employees leave balances, it is usually the permission have not been applied correctly. Follow the steps below to rectify.
Go to Employees, then User Roles.
Under Name type in your employee's name, and under the search box type in Leave.
The grid will change and you will see View Employee Leave Balances.
Slide the toggle across if it is red under your managers to green. This will enable visibility.
Save and Close