To disable the 'Back Tap Detected' banner on your iPhone, go to Settings, then Accessibility, Touch, and finally Back Tap.This banner appears when the Back Tap feature is triggered by double or triple-tapping the iPhone's rear side.You can turn off the banner by toggling off the 'Show Banner' option in the Back Tap settings.Alternatively, to completely disable the Back Tap feature, set the Double Tap or Triple Tap actions to 'None'.