The single page docs are missing the "oc adm policy add-cluster-role-to* and remove-cluster-role-from-* commands.  These options exist in these docs:

https://docs.openshift.com/container-platform/4.14/authentication/using-rbac.html

but not in these docs:

https://access.redhat.com/documentation/en-us/openshift_container_platform/4.14/html-single/cli_tools/index#oc-adm-policy-add-role-to-user