It was easy to set up the mesh. I already have the synology mesh with a RT2600ac and MR2200ac. I backup the configuration from my RT2600ac and restored on the WRX560. After that I factory reset the RT2600ac and join the mesh of the WRX560. It keep all my configurations.
A few of old and new devices that I was having issues connecting, are now all in my WIFI.
The router was fine but the power cable provided did not work. After hours of debugging I found out it was the wrong amps. I bought a new cable and the router is fine.