I have set up an Easy Mesh network with an AX55/AX3000 (V1 Firmware 20250821) main router and an X18/AX1500 (V1 Firmware 20250821) as Easy Mesh client. More AX18's are already on the shelf and waiting to extend the network. 

So far so good, but the Easy Mesh only works via WLAN and does not switch to ethernet backhaul when the routers are connected by LAN cable. You can see in the administration tool that the connection still runs via WLAN. This is not what I want because later on the routers will be too far apart from each other to have a good signal.

This is the list of routers that should be able to use Easy Mesh ethernet backhaul: https://community.tp-link.com/en/home/forum/topic/593722

AX18 is not listed but AX1500. Both is written on my router! Is there any difference? Is my router capable of using the ethernet backhaul or not?

If the AX18/AX1500 in combination with the AX55/AX3000 (main router) is able to have the ethernet backhaul, what am I doing wrong?

Best regards,

S. Stark