indeed this is the new default. And, historically, because of a CVE raising an issue about it, dropping discovery of /api has been removed but then temporary restored in 4.1 and removed in 4.2.
On the Jenkins plugins we were about to fix similar issues, cause /oapi was deprecated in OCP 4.2 . We depends on kubernetes-client Java library which fixed this.
Otherwise, IIRC, the eclipse plugin required credentials (or a token) to connect to openshift server, so in your case, you maybe "just" need to use them to then get the endpoints.