As an admin, you can apply for everyone on the team.
As a manager, you can apply on behalf of your reporting employees.
To apply for leave:
Please head to Leaves section on the left navigation bar and select "Overview" section.
Click on "Apply leave"
Pick the employee name and other relevant details like leave type, duration, date, any remark (if any, depends upon the team setting that may required for a specific leave) and hit Apply.
As leave is applied by manager, the leave will be auto-approved and email confirmation will be sent to the manager and employee.