In the Camera view, when you draw on a layer, the artwork is displayed in the correct order. For example, if the layer on which you are drawing is located behind an object on another layer, the lines you draw will be hidden behind that object.
You can display a selected drawing on top of everything while you draw. Then, each time you select a drawing tool, the drawing is displayed in front of everything in the Camera view. The Timeline and Node view ordering remain unchanged.