Issue with Grafana reading Billing metrics from CloudWatch.

Hi, I am unable to get Aws/billing data in Grafana.

I integrated my AWS Cloudwatch with Grafana. I am getting metrics from other services perfectly like Lambda, EC2, EBS, FSx..etc but not getting aws billing data.

Also, I have tried to switch regions to the region where I have deployed my servers as well as us-east-1 but still, I get no data from AWS/Billing.

The Grafana access role has CloudWatch and Billing ReadOnlyAccess.

Any ideas how I can get around this issue?