I was exploring methods to extract the point cloud data outside SDK and the RVIZ to work with Open3d and it was a hustle in the beginning, tried many methods like shared memory, extracting the raw input from the ethernet port and many things, later I tried with subscription name, and it worked but need to be careful while extracting the data from there as setting up nodes it curtail.
End result: Made a web page as a controller for the whole Lidar working and controlling.
moving forward with learning SLAM process for the lidar.