There's not a limit to the icons, but after the 4th they will be covered by the notch. (Actually you will see only part of the 5th lol)
How to enable:
1- From TWRP flash
statusbar_enabler.zip (works with both 8.9.20 and .24)
2- Reboot
3- Connect your phone to PC with 'USB debug' enabled, start a CMD and type: "adb shell settings put system status_bar_show_notification_icon 1"
4- Go say thanks to mi-globe dev & enjoy!
Fuente:
https://forum.xda-developers.com/mi-...tions-t3849563