Is there a way to know Touch ID is available, but can't be used because the device was just rebooted? Or does it act like there's just a password?
I don't know the verbatim message, but it says something along the lines of "Passcode is required to enable Touch ID"
Edit: with Touch ID enabled, if you slide to the lock screen without touching the sensor, it says "iPhone requires your passcode after restarting" but the title says "Touch ID or Enter Passcode"