@Gerryo Did you consider to run the network with the M5 ad the "main deco"? Maybe it's stupid but according to this: https://community.tp-link.com/en/home/forum/topic/598600 M5 should be still having...

@David-TP Hi Hello everyone in the forum. Glad to join. Will we see the Eco mode on deco X10 please? I wanted an upgrade to WiFi 6 (x10) from wifi5 (M4) And to my surprise Eco mode went missing :(...