[keycloak-user] RHT SSO 7.1 + OAuth2 Identity Provider

Hello, Keycloak / RHT SSO supports social login and custom / user-defined IDPs. The options for custom IDP are SAML v2.0, OIDC v1.0, and Keycloak OIDC. Does keycloak support a user-defined IDP that uses OAuth2? If not, is this possible to implement / what is the process to add an OAuth2 IDP? Thanks, Brent