What are the reasons why the text message effects in iOS 10 do not move?

Check to see if the 3D Touch function is turned on, and also make sure that you have not turned on the "low power mode" of the battery and "reduce dynamic effects" in the accessibility function. Because this function will weaken the dynamic effect, and when the dynamic effect is weakened, the invisible ink function cannot be used.

First select "Settings-Accessibility-Turn on 3DTouch", then enter text in the information input interface, and then press and hold the blue arrow on the right to select special effects.