You can follow this tutorial to manually launch the Niryo One ROS stack on the Raspberry Pi board. :)
If the auto launch on start up is no longer working, it means that maybe you changed or broke some configuration.
Try to execute the command “sudo systemctl enable niryo_one_ros.service” and reboot the robot. If it still doesn’t work, check about your systemd configuration and the list of services that are launched on boot.