The COM2 port is not displayed in the computer device manager, because the motherboard used to have two COM ports, and the installed multi-serial card driver sets the port number from COM3 by default.

This can change the COM port number in Device Manager.

Method:

Select the COM port to be changed-Properties-Port Settings-Advanced -COM Port Number-Select COM2- OK.

Look at the COM port number after changing it, and there will be COM2 port.