Is MPro Mesh Easymesh? - I cannot get EX5601-T0 to see a TPlink AX12 Router

Hello,

I'm hoping or some help. I have an ISP provided EX5601-T0. I need to use it to get the best speed from my ISP. If I use any other routers the speed is terrible. I want to create a mesh system using Easy Mesh which I have read that this router supports. However, when I try and pair my TPLink AX12 router that is also an Easy mesh router, the Zyxel router cannot see it, not even when connected to one of the LAN ports. I have tried the MPro app and the Zyxel One app. Neither do anything to solve this and the One app only seems to allow Zyxel extenders. Can anyone help me get this working please?

Many thanks in advance.