If applicable, which other mod(s) is/are involved in your request?

SimpleCorn by Cleverpanda714 - https://www.curseforge.com/minecraft/mc-mods/simple-corn

Corn, Roasted Corn, Popcorn, Corn Chowder, and Chicken Corn Chowder are not supported by Diet.

What is the new support or change you're requesting?

Item ID's for unsupported food (I'm also going to throw my nutritional guesses in for fun)
simplecorn:corncob (I would guess around ~1% vegetable)
simplecorn:roastedcorn (I would guess around ~8% vegetable)
simplecorn:poppedcorn (I would guess around ~1% vegetable)
simplecorn:cornchowder (I would guess around ~8% vegetable, ~2% protein)
simplecorn:chickencornchowder (I would guess around ~10% vegetable, ~10% protein)

While I will be adding the others, I'd just like to confirm if you're seeing any Diet values for Corn Chowder and Chicken Corn Chowder? Because they should have Proteins by default since they have milk and chicken respectively, which is what I'm seeing in my test instance.

Yes my apologies I hadn't noticed that myself. I can confirm I see protein values for the chowders. I guess the only thing the mod doesn't do is make them stackable like the other stews/bowled food.