Narrow clavicles, what could I do to grow them better before I turn 25 or the age where puberty won't help anymore

I personally already think that I do really have narrow clavicles. I never really thought of this or noticed until I got into working out for quite some time. And I realized that the reason why my physique is so bad is because I have narrow clavicles, not only that, my other muscle insertion too sucks.

Been working out for like 1 and a half year and never have supplements plus I started really skinny.

Turned 16 almost a week ago. And I read that a person's clavicles actually grow until the age of 16-25 or puberty until 25, slowing down the growth the closer you are to 25 so I'm really hoping that my clavicles could still grow. Tho I have some doubts since Ive been working out and I don't think my clavicles really grew that much, it's still short. I wanna know what else maybe I could do to support the growth of it before I turn 25. I already do workout esp my shoulders, but I just can't go to the gym that frequent, just home workout with bodyweight and my 25kg adjustable dumbbell here.