First, you need to confirm whether the wiring is correct: CAN_L needs to be connected to CAN_L, and CAN_H needs to be connected to CAN_H. After confirming that there is no problem with the wiring, I suggest you use the Arduino board to test whether it can communicate, because the example you gave seems to use Arduino as the carrier. If the Arduino can’t run, maybe there is a problem with the CAN bus. If the Arduino can run but the Wio Terminal can’t, it might be a code compatibility problem.