Minecraft wiki entry for Hunger_management, associated text: Advantages:
They restore one of the highest amount of hunger and saturation (12.8 points) of any food in the game.
Two pieces regenerate 25.6 saturation, filling the saturation bar, so the player doesn't need to eat again for a long time.
Can be found relatively early on, provided there are cows, mooshrooms and/or pigs nearby.
Cows, mooshrooms and pigs can be bred to supply the player with raw beef and raw porkchops.
Cows, mooshrooms and hoglins also supply the player with leather.
Hoglins are a source of porkchops in the Nether.
Since hoglins are hostile mobs, they respawn quickly, making breeding unnecessary, enabling efficient hoglin farms to be built.
Raw beef and porkchops can be cooked quickly using a campfire or soul campfire when away from a reliable source of food.
All these mobs can also be killed while on fire to get cooked meat directly.
Cooked beef ‌[BE only] and cooked porkchops are offered by butcher villagers at reasonable prices.