So for my home network, I have a superb 4g unlimited data SIM plan that is in a 4g TP-Link router with 4 Ethernet ports. I also have an 8-port Netgear Ethernet switch connected to one of my router's ports. Everything works well.
However, in a separate area of my home, I want to connect multiple devices to the home network via an Ethernet cable, not wireless.
I am not an expert on the network and I wonder what would be the best way to do it, please? I have some spare routers (any of them is an Apple AirPort Extreme) so this can be used, or would I need to find some kind of wireless Ethernet switch to connect first to the wireless network, then use the Ethernet ports connect to the devices?