You can use this also.How did you get immersive mode?
But if you use the command NO NAVIGATION BAR, navbar will remain hidden constantly, I mean, even of you swipe up from bottom of the display to reveal it, as it works usually?
This will show the bar when swiping from bottom, right?All those adb commands allow for swipe to reveal meaning if you swipe up from the bottom edge or down from the top edge the navbar/status bar will reappear for a few seconds. There are ways to completely disable it but I prefer this way.
Side Note - This is the Command to type
adb shell settings put global policy_control immersive.navigation=*
Include the *