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At least those have to be passed along to the Syndeia SP in the SAMLResponse as Attributes. Syndeia needs names to display for the user and an email address to uniquely identify the user even as the user authenticates with numerous services.
Okta’s Guide to Configuring Okta as a SAML IdP
Visit https://help.okta.com/oie/en-us/Content/Topics/Apps/Apps_App_Integration_Wizard_SAML.htm?cshid=csh-attribute-statements-saml#SAMLAttributeStatements to learn what Okta advises for configuring its service for use as a SAML2 IdP.