Keda apache-kafka scaler for MSK cluster can't connect using IAM / K8s AssumeRole

[nkfirdigi]

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Keda apache-kafka scaler for MSK cluster can't connect using IAM / K8s AssumeRole
Using keda-2.14.2
Using apache-kafka scaler connected to MSK cluster.
Secret definition:

apiVersion: v1
kind: Secret
metadata:
  name: keda-kafka-secrets-msk
data:
  sasl: {{ "aws_msk_iam" | b64enc }} # or scram_sha512
  tls: {{ "enable" | b64enc }}
  awsRoleArn: {{ "arn:aws:iam::<....>:role/KubernetesServiceAccount_keda" | b64enc }}
  awsRegion: {{ "eu-west-1" | b64enc }}

Expected Behavior

Expecting the AWS client to use k8s assume role IAM to access MSK cluster with no need to specify access key and secret.

Actual Behavior

ScaleObject error: requires to define access key and secret

KEDAScalerFailed
error parsing kafka metadata: awsAccessKeyID not found

Steps to Reproduce the Problem

1. define apache-kafka
2. define sasl of type "aws_msk_iam"
3. define tls: "enabled"

Logs from KEDA operator

KEDA Version

2.14.1

Kubernetes Version

1.29

Platform

Amazon Web Services

Scaler Details

apache-kafka

Anything else?

No response