Hunger on Peaceful was a great mod, but some wanted it for a newer version.
Today, I present you Hunger in Peaceful. It's the Hunger on Peaceful mod, but for newer versions.
Hunger in Peaceful makes the hunger and health system work like the Easy difficulty, so you can lose hunger and eat, just like higher difficulty levels.
Original: https://www.curseforge.com/minecraft/mc-mods/hunger-on-peaceful
Thanks to harborsss for making an amazing mod for the same purpose for 1.21.4 before I did.