Explanation
Graphical user interface, text, application, chat or text message Description automatically generated

Reference:
https://docs.microsoft.com/en-us/power-virtual-agents/publication-fundamentals-publish-channels

Explanation

Box 1: Yes
You can use keyboard shortcuts in PowerApps. Keyboard shortcuts give you an alternate way to do common tasks instead of using your mouse or tapping with your finger. They help in seamless navigation of the interface.
Box 2: No
The following software combinations are the supported recommendations for consuming PowerApps with a screen reader:
Windows: Microsoft Edge / Narrator
macOS: Safari / VoiceOver
Android: PowerApps app / Talkback
iOS: PowerApps app / VoiceOver
Box 3: Yes
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 Accessibility checker in PowerApps Studio. This tool not only finds potential accessibility issues but also explains why each might be a potential problem for users who have a specific disability and offers suggestions on how to resolve each issue. The Accessibility checker detects screen-reader and keyboard issues for you, and you can find information about how to fix color-contrast issues by using accessible colors.
Reference:
https://docs.microsoft.com/en-us/powerapps/user/keyboard-shortcuts
https://docs.microsoft.com/en-us/powerapps/user/screen-reader
https://docs.microsoft.com/en-us/powerapps/maker/canvas-apps/accessibility-checker

Explanation
Text, letter Description automatically generated