Can we have a custom time category in the time totals of employee responsive UI page

We are using the custom solution for part-time employees because they don't have definite shift. Business wanted to create the work schedule automatically based on FTE and existing work schedule linked to person. Business don’t want to assign it manually. So, we have assigned the work schedule of full-time employee to part time employee and do the calculation based on work schedule hour with FTE. But It is showing the incorrect work schedule hour of the part time employee because full time work schedule assigned to part time employees.

 

Does anyone have used the custom time category in the below page? We wanted to show the existing work schedule hour based on FTE(Work schedule hour * FTE). So, it will show the correct hours for part time employee.