Hello agicortex ,
480P is not supported as the mono camera resolution is 1280x800. So only 800P, 720P, and 400P are supported. On OAK-D Lite the mono camera resolution is 640x480, so only the 480P is supported.
You can set do
camRgb.setIspScale(1,3) to downscale color frames from 1920x1080 to 640x360, which would be the closest to 400P. StereoDepth node would then also downscale its results to the 640x360.
stereoDepth.setDepthAlign(dai.CameraBoardSocket.RGB) (example here), depthai will also scale depth to have identical size as the rgb (in this case) frame - so that's already supported.