GP3 is supported without a need to use 'rwoScName'. It can be set via installer-values.yaml file with ebs_csi.enabled: true
You can find the guide here: https://docs.sisense.com/main/SisenseLinux/implementing-amazon-ebs-csi-driver.htm
> What does the "default" and "standard" refer to?
They are examples from the typical options. E.g. there is 'default' SC on AKS and 'standart' SC on GKE. You can see them with 'kubectl get sc' on your cluster.
The supported storages are actually in the list of storageType options. The purpose of rwoScName / rwxScName is to use others that are not officially supported if you have a core requirement. There are still minimal performance requirements of 100MB/s / 1600 IOPS, but you can discuss a particular SC with Solution Architects.
