trying to understand how to setup/install the deco m4, from the video link guide below:

https://unifi.com.my/unifi-experience

does the main node remain plugged-in to the LAN2 wifi router?

Hi everyone, when I check maxis fibre plan they give their "next-gen wifi 6 router", under the highlights it says there is built-in "Easy Mesh" technology.

Does this mean when I want to use 3rd party mesh units (e.g. Deco), I don't have to connect the first AP to the router by LAN? Can straight away put the router and Decos in the same "mesh" with same ID & password?

Or either way still need LAN connection to router (if lets say I want to keep the router and use both Decos as AP)? Thanks sifus

so basically come back to first post, its ok to use any router that you have (like im using tenda-ac18), and then i put another mesh unit at upstairs connected with LAN?
- The ssid shared the same with the ac18 router?
- Then In future if i feel need to install another unit mesh, but i dont have wired, can i connect the second unit by wifi alone?