Was it showing at one time? If yes, have you rebooted your router to see if that helps? I own two WDMYCLOUDS and they often do not show under Network, but a reboot of my router will usual get them to show. See image below.
Nope, tried that cat10w. When I go to My Cloud Home Manage my device, and enter the 9 digit number, it tells me I’m not connected to the internet

