How do I ensure that the CSI ext4 filesystem in GCP is created and mounted using the discard option for smaller snapshots

Question

The discard option is required to avoid taking snapshots of data that is not used by the filesystem.

However, creating a standard, documented, storageclass like the following does not use this option. How can I modify the storage class so that it uses discard?

apiVersion: storage.k8s.io/v1
kind: StorageClass
parameters:
  type: pd-standard
provisioner: pd.csi.storage.gke.io
reclaimPolicy: Delete
allowVolumeExpansion: true
volumeBindingMode: WaitForFirstConsumer