Hi @Jee-Woong_Choi ,
Welcome to the forum!
I think you are perhaps referring to our approach in this article and this tutorial.
Not pre-trained, as far as I am aware, but you can use that tutorial above to create your own reference sets.
We also have this resource of pre-existing species weights for different habitat types. There is not one for human skin, but there is for "animal surface" which would encompass skin samples from humans and non-human animals:
Good luck!