From Nightingale Wiki

Nightingale features survival elements and the very world itself will pose different challenges. Terrain and weather play a role, as do enemy creatures (PvE). [1]

Nightingale Will feature hunger mechanics as mentioned in 'Nightingale - Gameplay Trailer | Summer Game Fest 2022'. We have seen that you can farm plants including Berries from Bushes and eat Meats Harvested From animals and cook it.[1]