Wired satellite not showing up on Attached Devices

Indeed! The key was finding out why, which I didn’t. 😂

I had to put new heads on the cables as the Ethernet run to each room was just the wire and nothing else. I gave up on one of the rooms and succeeded in my office where previously a satellite was. Gigabit works great there, so perhaps a kink in the run to one of the other rooms. No big deal to have the main Orbi there, of course. Works perfectly. For now, though, I’ve reverted everything until new wall plates arrive tomorrow. At least progress has been made, and I thank you for your help thus far! I’ll update as soon as it’s all finished, of course.