If you use flex Payroll, you can easily reflect it in payroll after completing the separated employee annual leave settlement.
You can check the settlement method for unused annual leave of separated employees through the guide below.
Reflecting Separated Employee Unused Annual Leave in Payroll
Go to [Payroll] → [Settlement Template List] → [Add Settlement Template or click existing template] → [Click Payment Items] and enable the active/separated employee annual leave allowance toggle.
If you've completed the adjustment through the separated employee remaining annual leave adjustment feature, you can check the separated employee's unused annual leave days and automatically calculated payment amount in [Separated Employee Annual Leave Allowance] in the [Payment] step.