The individual the Dev bought the Eevee model from doesn't have any of the eeveelutions made. I think it'll depend on if Dev can find models in a similar style.
Ahh I thought they were free cuz the artist has some free models.
But they are super cute
https://www.patreon.com/Hibby3D/shop/eeveelution-girls-full-models-1199981