Modifiers can only be added to items by corporate and require approval from your RFC. Modifiers cannot be added to single locations so any modifier changes affect all other stores in the system which means that modifier requests are not always approved. If you would like to request a new modifier or a change to an existing modifier please submit a help desk ticket.
Modifiers are never added to local favorites or store-specific menu items. Please reach out to your RFC if you have questions regarding this.