In September, Apple officially released its iOS 14 software update, which introduced some new green and orange dots at the top of device screens.

Apple has added these as ‘recording indicators’, which clearly demonstrate to you if an app has access to your device’s microphone or camera – to give you more control over the permissions that apps have

The green dot is used to indicate when the camera is in use, and the orange dot indicates when the microphone is in use. It is then possible to determine what apps are accessing the camera or microphone and, if desired, such access can be turned off.
To change app permissions on iOS, go to Settings and then into Privacy. Read more from Apple on this point here.