You will need go into edit mode select the fills or the strokes. Then Press shift+Ctrl+ either up arrow key or down arrow key. Depending on which you selected. You can also access thru the menu Stroke->Arrange-> and then either Send to back or Bring to front. You will also want the stroke depth order set to 2D layers. I haven’t used the 3D Location setting so I’m not familiar with it. I had to look up what the default setting is and it’s 2D Layers.
