CloudWatch Dashboard Auto-Refresh: Screen Readers Not Announcing Metric Value Updates

Goal

Enable blind and low-vision operators to monitor real-time metric changes in CloudWatch Dashboards using screen readers while auto-refresh is active.

Constraints and Uncertainty

The AWS Management Console claims WCAG 2.1 AA conformance overall, but CloudWatch Dashboards do not publish a widget-specific VPAT. Research indicates that metric value elements lack consistent aria-live or aria-atomic attributes when auto-refresh updates occur, so NVDA, JAWS, and VoiceOver may remain silent during value changes. Behavior varies across browser and assistive-technology combinations, and console updates have introduced focus-management regressions in the past.

Questions

1. Which widget types (line, stacked area, number, text, custom HTML) currently expose live-region attributes on their metric value nodes during auto-refresh?
2. Is there a supported configuration or console setting that forces ARIA live announcements for metric updates without disabling auto-refresh?
3. Does the GetDashboard or PutDashboard API provide any accessibility metadata fields (e.g., reading order, alt text) that could be used to automate conformance testing?