Employee Shift Agreements (accept/decline) are displayed on shift assignments.
When a Shift Agreement is yet to be set by the employee, managers might instead see a Shift Interest (willing/reluctant) displayed that the employee set before being assigned.
If the Workforce Settings allow, employees might see the Shift Agreements of other employees.
Ideally, after some time and well before the shift starts, the roster manager will see all Shift Agreements set to Accept by the corresponding employees.
Shift Interest Display
Employee Shift Interest of Willing and Reluctant is shown to Roster Managers and is displayed in the Shift Assignment menu next to each Employees' name.
Workforce Settings contains various settings that control how both Shift Interest and Shift Agreements work on the roster. Including when, and if, shifts can be marked reluctant or decline.
Some Workforces won't use or need these features, and so they can be disabled in Workforce Settings.