you will need to make sure the pieces are spaced far enough apart to account for kerf, but your CAM program should cut on the inside or outside of the line you select depending on how you set it up. I use Estlcam, so I can’t speak to Kiri:moto in detail, but your vector drawings should be good to process on the lowrider. You will need to specify holding tabs. the laser doesn’t care if the pieces are loose once cut, but the cnc can damage them or fling them places if not held in place and the final cut tab removed with an oscillating tool or a chisel to finish the shape. Do anchor your piece down on your spoil board. You can do all pieces at once for sure, but it might be wise to test your feeds and speeds on one piece before committing to the entire set.
The one thing I would add is to remember thst the kerf from the cutting tool is round. That means that it can’t get into sharp corners (but it can still leave sharp corners on outside edges.)