Night Shift will filter bright blue wavelengths from your screen when it is enabled. To combat this problem, Apple released the Night Shift feature for its products, iPhone, iPad, and Mac. This may carry some risks for adverse effects in humans. These electronic devices emit more short-wavelength (bright blue) light. It is known that the use of electronic devices (computers, tablets, or TVs) at night and specifically during the hours before sleep can cause delayed sleep and sleep curtailment. Poor sleep may lead to many health problems such as mood disorders, diminished alertness, and performance.
That's why Apple introduced Night Shift back in. You probably know that excessive exposure to electronic screens before bed can disrupt your sleep. Research shows that there is a decline in average sleep duration and quality over the past few decades. Night Shift alone may not be helping you sleep.