Configuration for sales order processing for customer projects (professional services) belongs to the sales component and it is beyond the scope of this course. You can find the relevant configuration under Sales in SAP Central Business Configuration.
Please refer to Sales Courses in Sales in S/4HANA Cloud, public edition | SAP Learning for detailed information and certification on Sales processes.
You can also review Unit 4 - Understanding Customer Project Management for information on how the sales order is created during the customer project setup, and Unit 5 - Completing Project Billing for Professional Services for details on Project Billing and material determination for billing.