Data activator triggers

Hi chetan8080 -Alerts in Power BI are triggered when the data crosses a specific threshold. If the data changes but doesn’t cross the set threshold, the alert will not trigger.Check the Condition Type: Ensure that the conditions are set to trigger alerts in both directions (above and below the threshold) if needed.

Try creating an alert based on a simpler visual or single measure to see if that works, which might help narrow down the problem.

lastly, Check your notification settings in Power BI under Settings > Alerts and verify the correct email is associated. Also, check the spam/junk folder for missed alerts.

ref links:

Tutorial for setting data alerts on Power BI service dashboards. - Power BI | Microsoft Learn

Solved: Dashboard Alerts not working every day - Microsoft Fabric Community

Hope this helps.