Is the air pressure after boosting the engine throttle higher than atmospheric pressure?

It must be higher. The purpose of supercharging is to improve the power of the engine without changing the cylinder volume. As we all know, the cylinder pressure of an ordinary engine after air intake is less than one atmosphere, while the cylinder pressure of a supercharged engine after air intake exceeds one atmosphere or even several atmospheres. In this case, we can increase the fuel quantity and improve the power of the engine without changing the weight and volume of the engine.