So my [whole] home network is 192.168.5.0. My Printer is 192.168.5.32. I got a new wifi mesh system and it created its own 192.168.1.0 Network. Now, the weird thing is, I can Ping (from the new 192.168.1.0 Network) any IP on the 192.168.5.0 Network without any configuration and so 1 network sees the other, but the new network will not see the Printer!!!
I set the new Mesh to AP mode and now EVERYTHING is 192.168.5.0, but now I can fiddle around for fun all the cool options on the mesh, when not in Router mode.