Normal. Add some training to the weak side, such as deliberately supporting one hand to assist the other hand to do push-ups. When using dumbbells, do more with your left hand. There are natural reasons for the shape of abdominal muscles. If all six pieces are clearly visible or asymmetrical, it is congenital. If the abdominal muscles are just exposed, strengthen the abdomen. The picture below shows the bodybuilding champion Joe Kate, aiming at congenital asymmetry.