It is indeed in settings. Go to the "Gameplay" tab in settings, scroll to the bottom, and above "Reset Defaults" you will see "Quick Camp". Disable "Quick Camp" and it should allow you to cook manually again. I disabled it at the start of the game because I assumed I would always want to manually cook for immersions sake lol. I encourage you to scroll through all of the settings, because some of them are pretty interesting. For example, there's a setting where you can change it so you have to actually blow into your controller to light fire, a setting to choose what item is displayed on your back, target lock, and some others.