Preserve Certs for K8S Cert Manager

Hi
Using Cert Manager for kubernetes
https://github.com/cert-manager/cert-manager/releases/download/v1.3.1/cert-manager.yaml
what would be the proper way for preserving the certs among different deployments of cert-manager it self or recreation of related ingresses so that to reuse previously issued ones and not to recreate the certs over and over again.
Is it a matter of secrets to store or mounting any volume to cert-manager would be ok?

Thank you

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