After the picklists have been set for objects, it's time to set the object picklist field so that Approval Status is available on the object record.
To add a picklist field for approvals to objects
Go toBuild > Customize > {Object Name} > Fields.
In the Custom Fields & Relationships section, click New.
Select Picklist data type and click Next.
On the Details page, enter the following to ensure approval statuses will be available for the custom object and click Next.
Select which users will be able to see the picklist and click Next.
Select which page layouts will include the picklist and click Save.
The Approval Status picklist is added to the Custom Fields & Relationships related list and the Approval_Status__c API is automatically added to the picklist.
Lookup Relationship with Approval Request Object
To have visibility on approval requests that are associated with the custom object in a related list or in Approval Center, you must create a lookup relationship between the approval request object and your custom object.
