With the new OpenShift Container Platform (OCP) 4 now available (see this article), even if this is a major shift compared to OCP 3, JBoss Tools is compatible with this major release in a transparent way. Just define your connection to your OCP 4 based cluster as you did before for an OCP 3 cluster, and use the tooling !
Related JIRA: OSJC-286
A server adapter has been added to work with Wildfly 17. It adds support for Java EE 8.
Related JIRA: JBIDE-26648