2 years
That setting is for the in app navigation bar, not the android navigation bar. I am referring to this:

That setting is for the in app navigation bar, not the android navigation bar. I am referring to this:

Full immersive mode, or transparent navigation bar. Gesture navigation is horrible.

Full immersive mode for non Samsung devices, or transparent navigation bar for those of us who hate gesture navigation.
I just wish they’d actually deliver on promised features instead of this profit pumping FOMO bullshit.
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Android 10 and below used to have a system wide full immersive mode where you could hide the navigation bar and status bar. They removed the feature in android 11. Samsung phones still support it, but if you use stock or close to stock android, you’re out of luck.