Install K8ssandra operator with non selfsigned certs

I am trying to install K8ssandra operator using helm into our EKS cluster. we are not allowed to use self-signed certs, but I can’t figure out how to let K8ssandra operator create/use non-selfsigned certs - I have cert-manager installed and configured and I can create cert through it.

I tried to use
–set admissionWebhooks.customCertificate=namespace/certificate-name
but it seems does not work for K8assandra operator at all - not propagating to cass-operator. and operator during installation still trying to create self signed certs.

am I missing something ?