Why doesn’t the Item Notes page appear in the settings?

Because your role doesn’t have the Manage POS Line Notes Library permission. Without it, the Item Notes card is hidden from both Sales Settings and POS Settings. The account owner has this permission by default; it’s disabled for other roles.

To grant it to an employee, go to Employees → Manage Employee Roles, open the role, enable Manage POS Line Notes Library, then save.

Note: If the page appears but the notes table doesn’t, the Item Notes toggle is disabled; turn it on and click Save. Lacking the permission doesn’t stop employees from adding notes to items at the POS, but they can’t save new notes to the pre-defined notes.