@alemieux34 A Deco P9 is able to communicate with another Deco P9 via the power network. In the app, you will see "PLC" if a satellite Deco is using that to connect to another Deco.

@alemieux34 Do you intend using PowerLine to connect the additional extender to the mesh?

@Myscreenname123 While flashing blue, a Deco is broadcasting its own wifi network, named "Deco_....". Does your phone see that wifi network in the list of reachable networks?

@Wally1713 I understood Deco is using Beamforming, another method to reduce interference.

@PierreC83 Is this an issue only with the display of the app, are the two new Deco actually broadcasting the wifi signal, are they used by devices? To see the Mac address of the Deco (wifi BSSID)...

@PierreC83 in the Deco app: more, system, update Deco