out of box security roles within D365 Finance and Operations
Hi Arun,
The list with security roles, a short description, and the option to check the contents (duties, privileges, access permissions) resides within the application itself (Security configuration form). There are also security roles listed in the Dynamics 365 Licensing guide, but that is for required license SKU purposes only. There is no documentation page with a list of the security roles.
Anyway, within implementations, apart from the system administrator, system user, and project timesheet user roles, I haven't seen other roles being used. There were always custom roles to meet the organization's requirements.