If you have an iPhone X, XS, XS Max, or XR, then you’re already familiar with the 3D Touch-based Camera and Flashlight shortcuts on the left and right sides of the Lock screen. In some of the latest versions of iOS, these shortcuts make a tactile ‘clicking’ sound when actuated.
Unfortunately, there isn’t a jailbreak for iOS 12, but those using a jailbroken installation of iOS 11 can now emulate the sound heard on iOS 12.1 when using these shortcuts with a new free jailbreak tweak called malleus by iOS developer Sam Gardner.