I did just see that it does show up correctly on the model in the texture painting mode if I put it in material preview view, which is nice to see, except that when I try to actually paint on it, it shows up in the wrong place on the texture. (E.g. I paint by the eyes which should show up by the tuna name part, it shows up on the nutrition facts section).
I’ve attached the files, I imagine they’re full of random issues from me experimenting with various things but I hope they can be of use.
TunaBot Files