The Asus ZenFone Max Pro (M1) is receiving a new software update which brings along the Digital Wellbeing feature that lets you keep a track of how much time you spend using an app and help cut down on your phone usage.
Additionally, this firmware also fixes an issue related to the dark theme and bumps up the Android security patch level on the smartphone to June 2019.
This new update carries version number 16.2017.1906.056 and is rolling out over the air for the ZenFone Max Pro (M1) units having model number ZB601KL.
The update should reach your phone in a week or two, but if you get impatient, you can always try pulling it manually by heading over to the Settings > System > System updates menu.
No update in my mobile
114.68 MB 1. Update security patch 2. Fix no effect while applying dark theme 3. Add Digital Wellbeing function Fr: PH (8/12/19)
Just install a Custom ROM. Its Android, so everything can be tweaked. Go over to xda forums for more help.