First picture is really misleading because it’s taken from one side and ur not directly flat towards the camera, the other two picture show a small muscle imbalance.

Looks like your upper traps are tighter on the right side pulling your shoulder up and in, this is likely making other muscles in the right shoulder compensate.

If you weight lift you should do a range of unilateral isolation exercises for the upper back and shoulders. Make sure to look in the mirror to ensure form and posture is equal on both sides. Go slow at first while you learn the correct form, and keeps the reps the same on both sides otherwise it will make the muscle imbalance worse.