According to iPhone tipster Mark Gurman, Apple has been testing "an in-display fingerprint scanner" in this year's prototypes. Unfortunately, the feature will not be ready for a fall release, so Apple is looking to implement it in 2022 phones.
https://www.techspot.com/news/90429-apple-insiders-leak-iphone-14-bring-back-touch.html?utm_source=dlvr.it&utm_medium=blogger
https://www.techspot.com/news/90429-apple-insiders-leak-iphone-14-bring-back-touch.html?utm_source=dlvr.it&utm_medium=blogger