Is the camera aperture of the mobile phone camera big or small?

It depends on what you shoot with your mobile phone, what the shooting distance is, and whether the depth of field covers everything you want to shoot, such as:

The large aperture (f2.0) above is used to shoot portraits, and the shooting distance is close, so it is possible that the nose is clear and the ears are blurred (scene depth), but the same shooting distance is small (f2.4), so it is possible that the nose and ears are clear.

Everyone likes different things, some like clear portraits and fuzzy background buildings. Some people like people and clear background buildings.

Why can most SLR lenses adjust the aperture? Because the photographer should choose the aperture value according to the distance, focal length, longitudinal depth, brightness, shutter, sensitivity and so on.

But the aperture of the mobile phone is unchanged and cannot be adjusted, so there is nothing good or bad. Every aperture can make excellent films!