Doc link : https://docs.redhat.com/en/documentation/openshift_container_platform/4.18/html/security_and_compliance/certificate-types-and-descriptions#expiration-3

   In this above documentation is written "The self-signed CA is stored in a secret with qualified name service-ca/signing-key in fields tls.crt (certificate(s)), tls.key (private key), and ca-bundle.crt (CA bundle)."

But as checked in even latest versions the signing-key secret contains only the tls.crt and the tls.key, so we should remove the part from the doc for "and ca-bundle.crt (CA bundle)."

    OpenShift Container Platform 4.18

    Always

    1. Login to the RHOCP 4.18 or later versions of cluster
    2. Go to Namespaces> openshift-service-ca
    3. Here select 'secrets' and open 'signing-key' secret and check the data
    

CA part is mentioned in the doc    

There should be no CA part defined in the doc

    NA