no. I bought the two pack xiaomi mesh AX3000(Lets name node 1 primary, node 2 secondary) and connect to the main router of my internet via lan.
everything works fine this way since i did not notice any issue with it.

then i bought a single pack node(node 3), and connect it to the mesh system. placed it in a room which is far away from main node 1.
and from here i noticed, the node 3 is not connecting to node 2(which is nearer), but connecting to node 1 instead. end up low signal at node 3.

My advice if you plan to add AX3000 to your current router, i think you might want to reconsider. The guest network (if u use it) will not be available on all nodes. Its only available on node 1.
If there is no solution available for my case, i think i will have to change to another brand.

Hi bro, I am currently using Xiaomi AX1800 router which connects to my 5G router right now.  Thought of adding a Xiaomi AX3200 soon, is the AX3200 router good ?

The current AX1800 has a weak rannge / reach, surprisingly.