Generally speaking, men with broad shoulders will appear burly, strong and tall, which will make people feel masculine and make many women feel safe. For men who are taller and fatter, a relatively wide shoulder width may look better.
However, for short or thin men, a relatively narrow shoulder width may look better because it can avoid being too rough and make people feel more refined and elegant.
In short, everyone's aesthetic and body characteristics are different, so there is no fixed answer to the question whether a man's shoulder width looks good or not. It is important to choose a dress style that suits your body shape and style and show a confident and healthy style.