There are two ways to check the leave balance for employees.
Method 1: Leave balance via Leave Types Report
From the left-hand side navigation bar, click on Reports > Leave Types
(Do note, if you were to click "Leaves" instead, it will generate a report showing how many leaves each employee used)
Method 2: Leave balance via Employee's Profile
From the left-hand side navigation bar, click on Employees > All Employees > Select Employee: "View" button (eye icon) > Entitlements > under Leaves.
If you need guidance for the employee's leave balance, kindly refer to this article to check it further.