Setting up Per Diem and Mileage calculators for Spend Authorization

Summary:
Setting up Per Diem and Mileage calculators for Spend Authorization

Content (please ensure you mask any confidential information):

I saw a few topics about this in the past as well but wanted the most recent answer: Is it possible to set up Per Diem and Mileage calculators for Spend Authorization, just like we do for Expense Report?

For example, in Expense Report end user can calculate per diem and mileage using the rates defined in the system, can we set up the same calculation for Spend Authorization?

Example for Per Diem:

Or Mileage:

we can set up Mileage Rate for Expense on the back end and update it yearly, but this same rate doesn't appear for Spend Authorization, only Expense Report: