MicroXRCEAgent created px4 topics not shown in ros2 topic list

Hi, Me and my team are working on offboard control for a drone. Right now we are trying to connect our companion computer to Pixhawk6c via USB/UART RxTx - ttl - telem2. No matter did we use UART or USB, we always could get the MicroXRCE client to create topics yet they are not shown on ros2 topic list.

the serial port for UART we used is /dev/ttyS1 and that for usb-ttl is /dev/ttyUSB0