>>717413671you dont have enough zones so theres blooming, you can see the squares lit up as you move the cursor around against a black background
then to reduce blooming you need to use VA for higher contrast ratio, but vas tend to have slower pixel response times. Its unknown if fast va panels even exist in handheld form factors.
Then the miniled zones have a lag to them which can hurt gaming perf.
Oled meanwhile has pixel perfect lighting and 0.1 ms pixel response times and no issues for HDR