It is possible to export private cert and create a pem and crt file out of ACM. I want to use for my private domain by adding the pem and crt as tls secrets (Special use case)

Use it like

kubectl create secret generic ca-secret --from-file=tls.crt=tls.crt --from-file=tls.key=tls.key --from-file=ca.crt=ca.crt 

OR

kubectl create secret tls ca-secret   --cert=public.crt  --key=privatekey.pem