Enabling OIDC post application creation, the client secret is missing in the adminconsole.
When enabling OIDC post application creation in this simple use case create a launcher app or a SAML app then enable OAuthClient.
The client secret is missing regenerate client secret and is also read only so it's needed to create a new application.
This would prevent easy migration of a SAML app to OAuth for instance.
Symantec Identity Security Platform (Symantec IDSP, formerly known as AuthHub) 4.0.0
Public OAuth clients have no secrets, that's the reason why it stays read only and no regenerate client secret box is available.