Ref: https://docs.oracle.com/en/cloud/saas/project-portfolio-management/19b/oapfm/project-foundation-configuration-define-project-resource-breakdown-structures.html#OAPFM180158_2 Why can't I find persons in the list of resources when I enter team members, planning resources, or person rate schedules?
You can't find persons in the list of resources when you enter team members, planning resources, or person rate schedules in the following situations:
The administrator didn't assign a department while creating users. Persons must have an active assignment and be assigned to a department in Oracle Fusion Human Capital Management before they can be added as team members or entered as resources on the planning resource breakdown structure or person rate schedule.
The resource isn't active in Oracle Fusion Human Capital Management because the current date is before the effective date of the resource. If you want to include persons who will start in the future, select the Include people with future-dated effective start dates option when you search for the person.
Persons assigned as project managers aren't active as of the project start date.
The assignment of the person is terminated, and an appropriate value isn't set for the number of days to display people with terminated assignments. You can set the profile value appropriately at the site profile level using the Specify Number of Days to Display People with Terminated Assignments task in the Setup and Maintenance work area.

Ref: Implementing-Project-Financial-Management-and-Grants-Management.pdf (19A Part # F11256-01) Chapter 3 - Define Project Organizations Topic - Set Assignments and Project Data - How They Work Together (Page 29) Business Unit as Set Determinant Business units enable you to control and report on financial transactions, usually for specific geographical entities within the enterprise. For project management purposes, assign the Project Accounting business function to the business unit.
Business unit is a set determinant for the project-related reference data objects described in the following table.
Ref Data Object
Entities
Project Accounting Definition
Project Types
Project Rates
Project rate schedules
Project Unit as Set Determinant
Use project units to enforce consistent project management practices across your enterprise. Project unit is a set determinant for the reference data objects described in the following table.
Ref Data Object
Entities
Project Definition
Class codes, financial plan types, project plan types and project roles Project Transaction Types Expenditure types and work types You can only select class codes, plan types, roles, expenditure types and work types that are assigned to the same set as the project unit. To enable expenditure types and work types for use on projects owned by a project unit, assign the set associated with the Project Transaction Types reference data object to those entities

Reference https://docs.oracle.com/en/cloud/saas/applications-common/r13-update17d/faser/implementing-security-in-oracle-fusion-project-portfolio-management.html#FASER1722595 Ref to "Securing Project Financial Management and Grants Management Applications" Table lists predefined enterprise roles and the type of security that grants the role access to data in a work area or dashboard.
Enterprise Role
Work Area or Dashboard
Data Security Based On
Project Accountant
Asset
Project business unit
Project Accountant
Costs
Project expenditure business unit
Project Accountant
Revenue
Contract business unit
Project Administrator
Project Financial Management
Project business unit
Project organization
Project Billing Specialist
Invoices
Contract business unit
Project Creator
Project Financial Management
Project business unit
Project organization
Project Management Duty
Project Management Infolet Dashboard
Project assignment
Project Management Duty
Project Performance Dashboard
Project assignment
Project Manager
Project Management Infolet Dashboard
Project assignment
Project Manager
Project Performance Dashboard
Project assignment
Project Manager
Project Management
Project assignment
Project Manager
Project Manager Dashboard
Project assignment
Project Team Member
Project Financial Management
Project assignment
Grants Accountant
Invoices
Contract business unit
Grants Accountant
Revenue
Contract business unit
Grants Administrator
Awards
Contract business unit
Grants Administrator
Contracts
Contract business unit
Grants Administrator
Project Financial Management
Project business unit
Principal Investigator
Awards
Award assignment
Principal Investigator
Contracts
Award assignment
Principal Investigator
Project Financial Management
Project assignment