Is there a way to adjust the Fusion skin tone by detecting Users' skin tone?

I’m working on an effect that’s a fashion magazine consisting of one or two models or celebrities in each page. The user can fuse with any model they select in any page.
The one issue I have is that the fused image doesn’t match with the skin tone of the user. I tried the Skin tone mask option but it seems to accepts only one mask per project, but I have multiple fusions images.
Any suggestions and work arounds are appreciated. Please let me know if you need any clarifications if necessary.
Thanks in advance.
Here’s the link to the demo, https://drive.google.com/file/d/1b4B_Pd-l1IosazsCod1S4MjXj81AhF_d/view?usp=sharing