Apple has invited popular tech YouTuber Marques Brownlee to see up close how it tests the durability of iPhones before launch.
https://www.digitaltrends.com/mobile/apple-offers-peek-at-how-it-stress-tests-the-iphone/
https://www.digitaltrends.com/mobile/apple-offers-peek-at-how-it-stress-tests-the-iphone/