Problem Description of Kanban Salesforce :

Salesforce users cannot create Kanban salesforce views on formula fields.

Challenges to User/Developer :

A workaround is to create a picklist field that imitates the formula field.

Solution :

 Add the new picklist field on your Account page layout before selecting the field as a “Group By” option under Kanban Settings.

Considerations for Using Kanban In Salesforce 

Approach :

Create a Picklist field that holds all formula field values.

Technical Solution :

When a Kanban view has to be created based on a formula field, Create a picklist with all possible values of the formula field and hide it from all users using the “Set Field-Level Security”. Make sure the picklist field is placed in the page layout.

        Now, create a time-based workflow that automatically updates the picklist value depending on the formula field.

You can now create a Kanban view based on this picklist field

Advantage :

Easy to implement, easy to migrate, Kanban view is indirectly based on formula field.

the Kanban system as a way to manage work, including Flexibility. Focus on continuous delivery. Reduction of wasted work / wasted time. Increased productivity.

Issues :

Every formula field which should have a Kanban view associated with it must have a picklist field.

Conclusion :

Using this workaround, Kanban can be set up for formula fields.