OrbbecSDK_ROS2/docs/source/2_installation/registration_script.md

Registration script (required)

To allow the Orbbec cameras to be recognized correctly on Linux, install the udev rules:

cd  ~/ros2_ws/src/OrbbecSDK_ROS2/orbbec_camera/scripts
sudo bash install_udev_rules.sh
sudo udevadm control --reload-rules && sudo udevadm trigger

This step is mandatory for Linux users.

Notes: If this script is not executed, open the device will fail due to permission issues. You need to run the sample with sudo (administrator privileges).