The same option is provided for https://docs.redhat.com/en/documentation/red_hat_jboss_enterprise_application_platform/8.0/html-single/using_single_sign-on_with_jboss_eap/index#securing-applications-with-saml_securing-applications-deployed-on-server-with-single-sign-on[JBoss EAP 8 GA].
For an example about how to integrate Keycloak with JakartaEE applications running on latest Wildfly/EAP, take a look at the `servlet-saml-service-provider` Jakarta folder in the https://github.com/keycloak/keycloak-quickstarts[Keycloak Quickstart GitHub Repository].