Infolets missing in "Source to settle Infolets"

Summary:

Requirement: "Source to settle Infolets" (which exists in "Procurement Manager") should be visible for users who has "Accounts Payable Manager" role.

Process followed: Added "View Source to Settle Infolet Page" privilege to "Accounts Payable Manager" role.

Issue: "Source to settle Infolets" was visible for all the users who has "Accounts Payable Manager" role but some of the infolets (like Agreements, Inactive Agreements, Negotiated Savings and Awards, Negotiations and Requisition Lines) where missing. Need to know why some infolets are missing?

Also need to know if need to add any further privilege to get the full infolets.

Attached screenshots for more clarity.