iOS 14 also shows if an app is using the camera or phone. A green indicator will appear if an app is using the device’s camera, and an orange indicator will appear if the microphone is in use. App settings for hardware use can be changed under Settings > Privacy. Apps running on iOS14 will also be required to obtain permission to track users starting in early 2021.
Apple has provided a list of compatible devices for iOS 14 and iPadOS.