Welcome Michael,
Open the Laser window. It’s like the move window where the jog buttons are.
Bottom middle of that window you’ll find options for other com ports. Select another com port, pause for a second or two and try jog buttons.
If you open the console window you should be able to see the communication between the computer and the GRBL device.
If you see communication and you do not see motion it could be that the Laser engraver isn’t connected to the high current power supply that lets the stepper motors move.
This might also be helpful for your next questions.
Have fun!