I am rewriting the questions, as a result of the comments. I hope that this will increase clarity.
A while back we created with the AWS Certificate manager a public certificate which we are using to terminate the TLS traffic on our network load balancers.
Here the option that was selected:
Here an example for one of the load balancer configuration.
Now we would like to terminate the TLS traffic directly on an EC2 instead of the network load balancer.
When I want to export it in the UI the option for export is grayed out
Is there a way to export the keys or if not convert our existing domain *.xxx.com to a private certificate.
Thanks, all help is very much appreciated!