To configure Okta as your SAML Identity Provider with Feedback, you'll need to use these settings.
Okta Destination URL: Feedback ACS URL
Okta Recipient URL: Feedback ACS URL
Okta Single Sign On URL: Feedback ACS URL
Okta Audience Restriction: Feedback Metadata URL
Okta NameID format: Email
Here's a screenshot showing a correctly configured Okta IdP
