How to enable the auto-answer call feature in iOS 14 for iPhone/iPad/iPod Touch

Open the Settings app . Note: The Settings app icon may appear in a different place on your home screen than shown in our example, below.
In the Settings app, scroll down and select Accessibility from the list.
On the Accessibility screen, select Touch.
On the Touch screen, scroll to the bottom and select Call Audio Routing.
On the Call Audio Routing screen, select Auto-Answer Calls.
On the next screen, select Auto-Answer Calls to set the toggle switch to On.
You can now set the time limit after which calls are automatically answered - the default is 3 seconds. To adjust the time limit, tap on the + (plus) or - (minus) buttons.
When you are happy with your settings, you can return to the home screen page of apps by:
- On devices with Face ID: Swipe up from the bottom of the screen.
- On all other devices: Press the home button once.