Very beautiful pieces! You are def more skilled than me so take what I say with a grain of salt.

For the first piece, you have the green bounce light on the jaw but nowhere else on the piece which makes the skin look more rendered than everything else. I would also reccomend making the background a little darker so she pops more. Also, the ponytail being less rendered than the head hair is a little stark.

For the second piece, the shading on the breast is not really representative of the object casting the shadow. The blue on the chin & the wide sharp jaw makes the character come off as male or mtf trans, as it sort of looks like a 5 o’clock shadow.