Ask the photographer about the light.

1, I saw your photo on PS. You can't say that the exposure of this photo is wrong. On the histogram of PS, there are two saddle-shaped hills, but there are too few intermediate levels, so the problem lies in your lighting.

2. Your key problem is poor lighting, and the light is too "flat". Your two lights must be divided into primary and secondary lights, one near and the other far, so the brightness will be different. There should be a difference in brightness between the front and side of the bag, so that it will have a three-dimensional effect.

3. Because it is a black leather bag, the camera metering may be biased. You can try+1EV to compensate the exposure on the camera.