According to the official document, those two models do support Mesh via ethernet backhaul, but I can't manage to establish one. I tried connecting AX10's LAN port to AX55's LAN port, connecting AX10's WAN port to AX55's LAN port, but the satellite AX10 has always been connected wirelessly either way. The cable is functioning properly.

Moreover, in webpage's configuration UI, it reads "EasyMesh" but in Tether app it reads "OneMesh" and I have been told that OneMesh doesn't support ethernet backhaul.