Although this has been tested on OP6T, it could work for most Android Oreo and later phones.
As OP6T has shown a display screen every time a desired notification arrives, the app brings a black screen with LED animation notification.
+ Change the LED animation time.
+ Change LED colors.
+ Change the position of the LED.
+ Notify about missed calls.
+ Change LED size (Premium required!)
+ Add downtime (Premium required!)

Supported Android
(4.1 and up)
Oreo (8.0-8.1), Pie(9.0)

Download NotifyBuddy AMOLED Notification Light 1.81 Premium APK Mod SAP

NotifyBuddy-Notification-LED-mod-apk-Premium-v2.21.apk