If the "ELA" indicates edited regions, why is the region where the most obvious change happened (the bag) one of the darkest? I'm also not convinced on the lig

If the "ELA" indicates edited regions, why is the region where the most obvious change happened (the bag) one of the darkest? I'm also not convinced on the lightening of the skin tone. The lighting is entirely different in both pictures, and I have friends who have shifted tone more than that after a summer of tanning. (edit: her hair is much darker as well)