Enter Requisition Line option in RSSP

Summary:

Hi All,

We have created a custom role for RSSP access
The below two privileges are a added to the role..

• Requisition Self-Service User
• Requisition Self-Service Responsive Application User
  

However, after assigning this role to the users, we are not able to see the option of 'Enter Requisition Line' in RSSP.

But, once we are assigning the role of 'Advanced Procurement Requester' We are able to see the option of 'Enter Requisition Line'.

Do we always need to assign this role to see 'Enter Requisition Line'.? Or is there any privilege, that we can use to enable the option of 'Enter Requisition Line' in RSSP?