Hello Max and all,
Many people online don’t know my method . Only the useless adb method which removes the gap and makes your lockscreen unusable.
My method removes the ugly keyboard gap and gesture bar in OnePlus 6/6T, I don’t know if it’s on OnePlus devices after (OP7, OP8) and that’s it.
Prerequisites: Magisk Root
Download Full screen/Immersive gestures (Q-R) via magisk modules in magisk manager or https://forum.xda-developers.com/apps/magisk/module-fullscreen-gestures-android-10-t4086493/amp/
Make sure you have downloaded the latest version
Choose Full screen gestures
Done. That gap is gone and you can use your lockscreen too. Enjoy