Track Your IMDSv2 Migration with New EC2 CloudWatch Metric
AWS EC2 now gives you the ImdsV1Enabled CloudWatch metric to spot instances still running the older Instance Metadata Service Version 1 across all your accounts and regions. Set up dashboards and alarms to monitor your IMDSv2 migration progress without building custom tooling—it's available everywhere at no extra cost.
source: [aws/whats-new]