Control plane certificates are included in these namespaces:
openshift-config-managed
openshift-kube-apiserver
openshift-kube-apiserver-operator
openshift-kube-controller-manager
openshift-kube-controller-manager-operator
openshift-kube-scheduler
Control plane certificates are managed by the system and rotated automatically.
In the rare case that your control plane certificates have expired, see Recovering from expired control plane certificates.