The insect wrap provides 13 sat, 12 hunger
The insect sandwich provides 11 sat, 10 hunger

They both are shapeless crafting recipes, requiring 1 bread and 2 cooked arthropod (though wraps for some reason accept raw as well). This means that wraps will ALWAYS be the better option compared to sandwiches. There is simply nothing that the sandwich can do that the wrap can't do equally or better. There isn't even an issue of resources relating to the crafting instrument because they both use your hands. The wrap is simply just better.

(also it's really stupid and kind of weird for a mod to have CONFLICTING RECIPES BETWEEN 2 ITEMS THAT IT ADDED)

Both these issues could be solved if you added another ingredient, and maybe buffed the wrap some more. (I'd recommend glow lichen or something, but you're the dev)