Visualization metrics /aws/sagemaker/TrainingJobs from Amazon CloudWatch

I use Grafana 9 OSS in Docker deployment environment.
I try visualize amazon metrics from namespace /aws/sagemaker/TrainingJobs from cloudwatch. It’s the SageMaker service. I add datasource cloudwatch and custom namespace. Choose namespace, but field metric name is empty. I tried write code, but it unsuccesfully.