Thank you FM,
I understand what your saying about a switch but can a second router be used as a switch and a wifi extender ?
Yes! But ensure the second repurposed router is set to have a different IP to the main one, also turn it's DHCP to off. Connect one LAN port of the main router, to a port on the repurposed one.
That means only one of the router's issuing network IP's, and so no clashes.
That will give you three spare ports at the main router, three at your second one, and two wifi access ports. Or add a third, the same, and you three more ports, and a third wifi access port.
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