I'm using Realme X2 Pro before moving to BlackShark3 and was surprised that the experience is somehow downgraded due to the refresh rate. Realme X2 Pro is enforcing the 90hz across all apps while BlackShark3 is only for games and videos which is unacceptable for me. After searching, I managed to make the high refresh rate work on system apps which is the idea originally came from OnePlus 7 which can be found here.
This is tested in BS3 Global. Try at your own risk. I'm not responsible for any issue that may arise in your device (screen flickering, etc.)
You need to have adb setup in your desktop then enter the following line
For Windows 10/Mac:
.\adb shell settings put system display_refresh_mode 0
For Other WindowsOs:
adb shell settings put system display_refresh_mode 0
Please be reminded that this change will cost you significant battery drain but the device overall experience will drastically improve.