Hello Akshay, Emilian here with Okta's Customer Support Team, thank you for reaching out to us. Regarding the matter you've addressed, can you please provide us with a more detailed description of what you'd like to achieve? For instance, if you'd like to forward custom attributes to some application, you may do that by creating a custom SAML app and send whatever attributes the Service Provider supports through the SAML assertion (see link #1). If you would like to customize the values of the attributes that are being sent through an application, you may easily do that with mapping (see link #2). If you'd like to customize the user's attributes in the Okta dashboard, you may easily accomplish that by leveraging our REST API (see link #3).
Please provide us with additional details so we may better answer your questions! Looking forward to hearing back from you on this matter.
link #1: https://help.okta.com/en/prod/Content/Topics/Apps/Apps_App_Integration_Wizard.htm?Highlight=custom%20saml%20app link #2: https://help.okta.com/en/prod/Content/Topics/Directory/Directory_Attribute_Mapping.htm?Highlight=attribute%20editor link #3: https://developer.okta.com/docs/api/resources/apps.html
Emilian Aldea Technical Support Engineer Okta Global Customer Care