Surface Laptop not displaying through USB-C connected Monitor

From https://support.microsoft.com/en-us/surface/troubleshoot-problems-with-usb-c-on-surface-e32fea6d-8df1-eda6-1a8b-a1d1b88fd62e#:~:text=Unplug%20your%20USB%2DC%20device,your%20USB%2DC%20device%20again.

Unplug your USB-C device, then shut down your Surface by selecting Start  > Power > Shut down. After 10 seconds, press and hold the Power button for about 20 seconds until the Windows logo appears, disappears, then appears again. After that, plug in your USB-C device again.