In the second panel second bubble, 表示 would seem to make sense if he couldn't turn the screen on, but AFAIK neither Android not IOS allows enabling only biometric authentication, meaning it should always be possible to turn the screen on. One could assume Rinnosuke is an idiot and can't press a button, but then Renko's next thought bubble wouldn't make sense. It would be nice if someone could explain how that sentence works.