Why doesn't my Android 7.0 smartphone have Ambient display? I'm trying to figure out why my Android smartphone isn't showing notification on the lock screen when I receive a new Skype message. After some researchings, I found that it seems to have something to do with a featured called "Ambient display".

As this article explains, Ambient display is a feature introduced on Lollipop (Android 5.0) and above, and it wakes the device and light up the display for a few seconds when new notifications arrive.

My Android version is Nougat (Android 7.0) so it is supposed to have Ambient display. But after I followed the instruction of that article and went to Setting > Display, I cannot find any option called Ambient display.

Why doesn't my Android 7.0 smartphone have Ambient display?

== Edit ==

My device is CAT S41.
Your device doesn't have it as per the manual you can download from here 
But it does the Ambient  light sensor as mentioned here


Reasons for not enabling it are best known to OEM and you can ascertain from them and also request for inclusion in future updates (unlikely they would heed your request)

Edit

As suspected it doesn't support. Chat screenshots