Metrics in CloudWatch do not have ARNs, they're not exactly resources - more equivalent to a row in a database table.
CloudWatch metrics are data about the performance of your systems and hence they don't have ARNs. You can metrics explorer to get details of EC2 etc based on id.
CDK EventBridge CfnRule does not put events to a CloudWatch Log Groupasked 3 months ago
Is it possible to get a SQS subscription's ARN using CDK?asked 9 months ago
API to get all the resources that is used in an AWS account
Least-privilege Cloudwatch Logs policy for API GatewayAccepted Answerasked 10 months ago
Is Lambda invocation = 0 is a guaranteed metric that proves the Lambda function was unused during the period I provide to metric?Accepted Answerasked 8 months ago
How does Cloudwatch latency metric get calculated/ Did I find a bug in X-Ray Traces?asked 3 months ago
Is it possible to get the test package upload ARN for a run?asked 4 years ago
IAM policy editor warnings: Specify log-group resource ARN for the actionsasked a year ago
CloudWatch API Does provide the ARN of resources that it fetches
IAM Policy to get specific CloudWatch GetMetricData, ListMetricsasked a month ago