This article explains the gyroscope in Knives Out (smartphone battle royale). It covers how to set up and turn off the gyroscope, and compares shooting with normal settings. Please use this as a reference.
Table of Contents
What is Gyroscope?
Aiming Operation Using Gyro Function!
▲Gyroscope in Auto ON state
Smartphones are equipped with a gyro sensor that detects the device's tilt, and the gyroscope incorporates this function into aiming operations. When you tilt the device, the player's viewpoint moves accordingly。
Allows for Fine Adjustments in Aiming

The gyroscope allows for finer aim adjustments than aiming with your fingers, but it cannot make large aiming movements that would change your body's direction. It can be used as an aid for finger-based aiming.
How to Set Up Gyroscope
Auto ON and Scope ON!

You can find the gyroscope settings screen by going to "Settings" → "Combat Settings" → "Other" → "Gyroscope". There are two types of gyro settings: select Auto ON to always have the gyro ON, and Scope ON to have it ON only during ADS!
Adjust Sensitivity to Your Liking!

To change the gyroscope's effectiveness, go to "Settings" → "Operation Settings" → "Sensitivity Settings" → "Gyroscope Sensitivity" where you can set it for each field of view. Increasing the sensitivity % will make the gyro function more responsive.
Set the Blind Spot!

The gyroscope blind spot refers to the width of the field of view beyond cover. Increasing the blind spot value makes it easier to see the scenery beyond cover when looking through a scope near it. Be careful, as setting the blind spot too high can make it difficult to determine your position around cover.
How to Turn Off Gyroscope
Select "Close" on the Settings Screen

To turn off the gyroscope, select "Close" in the settings. Settings can be changed even during combat, so turn it off if you find it difficult to use.
Gyroscope Precautions
Aiming is Hard to Stop and Prone to Shaking
Even if you lower the sensitivity, the gyroscope reacts to slight tilts, making it difficult to stop aiming. It takes considerable practice to shoot accurately, and when you first start using it, your aim will likely be shaky and unstable. Get used to the normal settings before using it.
Can Easily Become a Nuisance to Others
Operating the gyroscope requires tilting your upper body, which can easily become a nuisance to people around you. When turning the gyroscope ON, try to use it at home or in a safe place where there are no people.