Alerts

Hello,

Native KPI alerts are mainly available in Power BI Service and usually work with dashboards, not directly from Power BI Desktop.
Maybe you could try using subscriptions or data-driven alerts after publishing the report to the service, without needing Power Apps.

Best regards,
Daniele

Solution:

This can be achieved directly using Microsoft Power BI Service Data Alerts without using Power Apps or Power Automate. 
 
Step1: Create a KPI visual in your report for the metric you want to monitor. 
Example: Total sales

Step2: Publish the Report to Power BI Service 

Step3: Open the report in Power BI Service  

Step4: click the three dots of the of the KPI then click Add alert 

Step5: Add alert rule and then click on apply. 

Once the KPI crosses the configured threshold, Power BI sends a Email notifications.