If you forgot where this or that iPhone feature is located, you can always use the search in the options.
To do this, go to the Settings app and drag the screen down. A search box opens to enter a query. You can enter part of the query and all similar matches are displayed.
The Auto Answer option itself has moved to iOS 13. Now it is on the Settings – Universal Access – Touch – Source sound a path .
Here you can enable the automatic answer to all incoming calls and indicate the sound source when answering. There is a custom pause between the start of the call and the answer.
You can immediately activate a conversation through an external speaker or a wireless headset.