How to display a notification for a longer time on Oppo

Oppo is a great device to have, but it has its flaws. One of the biggest complaints is that the notification display time is too short. It only displays text for few seconds and this can be frustrating when you want to know what the notification was about.
This section will show you how to make Oppo show the notification for a longer time (an alternative solution to bypass the watch limitations)