Iphone Auto lock time duration is different depending on what’s currently on your phone’s screen
Never knew this and not certain if it’s been the case for years but if you have set your auto-lock time to, for example, 2 min it’ll turn your screen off after 2 min ONLY if you left your screen on something OTHER than the home screen (an app, safari, etc). If it’s left on the “home screen” that time duration is cut in HALF to 1 min, in this example. Apparently Apple thinks if you are on your home screen and put your phone down that you are likely done using it so they took the liberty of halving the chosen auto-lock time duration for you! Interesting huh?