How do one specify the StepConcurrencyLevel parameter when creating EMR clusters through Step Functions?

The following can be found in the AWS Step Functions docs

As of emr-5.28.0, you can specify the parameter StepConcurrencyLevel when creating a cluster to allow multiple steps to run in parallel on a single cluster.

... but there is nothing about step concurrency level in the CDK Step Functions Task EmrCreateCluster docs

Environment

• CDK CLI Version: 1.100.0
• Module Version: 1.100.0
• Node.js Version: v14.15.0
• OS: Ubuntu 20.04.2 LTS
• Language (Version): Python (3.8.5)