Though this is tested on OP6T, it could be working for most Android Oreo and later phones. So I was annoyed not having an LED notification light on OnePlus 6T so I tried to make one of my own. As OP6T has amoled display whenever a desired notification comes the app brings in a black screen with notification LED looking animation. To use it.
XanderApps is the creator of NotifyBuddy that refers to the Personalization category. The developer released a new version of the app on Nov 24, 2020 and over 1M users downloaded and set up this application. According to the latest info, NotifyBuddy is rated 3.9 on Google Play.
Take into account ads and in-app purchases while downloading this application. Download the installation package of NotifyBuddy 1.86 that is completely free and have a look at users' reviews on Droid Informer. The app runs flawlessly on Android 8.0 and above. The download of the app doesn't contain viruses or any kind of malware.