The guide Configure Single Sign-on for Auth0 Dashboard explains a series of steps to configure SSO for Auth0 Dashboard using Okta (SAML), but is it possible to use Okta (OIDC)? 

Are there any downsides to using OIDC instead of SAML?

• OIDC
• SSO

• Pros: No need to do certificate rollovers when they expire.
• Cons: It is impossible to move to a different IdP transparently in the future. Changing IdPs is possible, but re-inviting tenant members would be needed, at least for the time being.