Box 1: App Checker -
Scenario: Several sales representatives have accessibility restrictions. User2 is visually impaired and cannot see images. User3 is unable to use a mouse.
Users who have vision, hearing, or other impairments can use your canvas app more easily and successfully if you consider accessibility as you design how the app looks and behaves. If you're not sure how to make your app more accessible, you can run the AppChecker Accessibility checker in Power Apps Studio.
Box 2: Solution Checker -
Scenario: Before deploying the app to production, you must ensure that the app conforms to Microsoft accessibility and performance guidelines.
Use solution checker to validate your model-driven apps in Power Apps.
Reference:
https://docs.microsoft.com/en-us/powerapps/maker/canvas-apps/accessibility-checker https://docs.microsoft.com/en-us/powerapps/maker/common-data-service/use-powerapps-checker