Currently, A2 only supports LDAP and a limited SAML 2.0 capability for SSO. Many SSO providers are moving off of SAML and using OIDC. A2's auth provider, Dex, supports OIDC and it would benefit a lot of customers if we enabled this capability within Automate as a mechanism for SSO authentication. This is especially needed because Dex does not seem to be maintaining or continuing development on the SAML 2.0 provider, so we are unlikely to be able to meet customer requirements for a more secure SAML connectivity in the future unless we start maintaining and developing that provider ourselves.
Here is the documentation on the OIDC provider in Dex.