IOS 17 Standby Bug
I know you have standby sleep on non-aod devices, but when testing it with auto sleep is set to never it still turns off! I feel that when auto sleep is off it shouldn’t turn off.
iPhone 13
Yes, you can get the Standby feature on, to the best of my knowledge, any device that supports iOS 17. However, unless you have a device that supports Always On Display, the screen will turn off. Tap the desk or nightstand and it will come back on again.