How do u know you’re full and satisfied?

May sound like a stupid question, but seriously, how do u know? Do you have to eat urself extremely full to be satisfied? I honestly have no idea how it works anymore, like do u just not think of food anymore at all? I remember how it felt pre ed obviously lol but I’ve since forgotten since I’ve trained myself to restrict. How does it work? Will it eventually be to the point where I’d feel it without eating myself nearly sick? Just curious idk how it works anymore 😭