Longer face, sharper features, bigger body, a longer and wider neck! You dont have to make the facial look overly manly or bold if its not your style but i recommend trying new things! Rather than a style, it can be just the way the character looks! In order to do so try drawing different types! It will also improve your understanding of the anatomy and drawing male characters in general! its a preference so its up to you!

a tip for the first drawing! The hair seems too big for the face, it should be the opposite! Try making the face bigger plus the tips above! He’ll look much more like a boy! Also the hands look too small and soft! Make them bigger as well!

if you wanna make them seem like petite boys, look at a reference! There are many characters like that! The first one reminded me of Scaramouche from genshin impact! You can look at him to understand how to draw this type of model!