It's not possible to see the breakdown of the employees' accrued hours for previous years.
To see it for the current year, follow the steps below:
Click Access Button
then click HR Admin.
Go to Bulk Actions then select Holiday and Other Events.
Click Holiday Accruals.
Select the relevant filters and click Next and you will see how much they have accrued.
πNote: If you want you can also see the full entitlement history this year for an employee.