Fullscreen ADB command is not working

Hi, I've noticed some slight retention on navigation bar and so before it's too late I've been searching for an ADB command for Fullscreen Immersive mode without Root. That was perfect for me.

THE COMMAND:
adb shell settings put global policy_control immersive.full=*

That doesn't work for me for some reason :/
Still steady, doesn't disappear in any app except for full screen YouTube (it's already been set so no difference)

The phone: Xiaomi Mi 11 Ultra
MIUI 14 version: 14.0.2
Bootloader...

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