Section 2

1. Yes. You can add the object detection control to analyze images taken by the camera in a canvas app. Refer to https://docs.microsoft.com/ai-builder/object-detector-component-in-powerapps.
2. Yes. The Predict action in a Power Automate flow is a generic action that be used with any of the AI Builder models. Refer to https://docs.microsoft.com/ai-builder/use-in-flow-overview.
3. No. The object detection model uses a control, not the formula bar.