Hello, I'm trying to find an answer to this question:

Is it possible to use my main router's wifi signal having decor m4 plugged into this network? Is it possible to have main router as a part of mesh system?

I bought 2pcs of deco m4 and now I'm looking to buy a new router wifi v6. But I wonder if I can use the signal from this router too (not just from decor m4 - which will be connected with cable to this router). I don't know how to find out if is it possible, or not (if it is possible) which router can be the main/core part of this mesh network. 

In other words: I want to have access to internet from all deco m4 and my router too.