I can assist you with setting up different work hours in payroll, @comunidad1996.
To add an extra pay item to QuickBooks Online payroll, simply navigate to the Employees menu.
Follow the steps below:
Go to the Payroll menu and click on Employees.
Choose your employee.
From Pay types, click on Start or Edit.
Select + Another hourly rate.
You can change the Pay type name if you want. Then enter the Rate per hour.
Once done, click on Save.
When creating paychecks, enter hours for corresponding rates. Refer to this article for more information about setting up multiple hourly rates: Pay an employee different hourly rates.