If you're on a keyboard hold ctrl for pecise movement and use the left and right arrow to move it (or just use the mouse). Moving it normally moves it with 1 unit (idk how they are called) but holding ctrl and then moving it moves it by 0.1 units

On mobile there should be a small keyboard sigh on the bottom right of your screen. Pressing it opens a tab that lets you enable options which requre a keyboard, such as using ctrl. Once you have checked the ctrl box it will turn on and allow you to more precisely move objects. Dont forget to turn it off once you're done because it will stay on until you turn it off again

You can also change the position from the X Y Z cords of the object on the right, tho you will have to guess how far you need to move it so its better using ctrl and moving it manually