@JIFourie If that is the case, you can try to change the 5G channel on the AX55 to 165 as well, then monitor the connectivity on the HomePod. BTW, is the AX55 a US version or an EN version? How about...

@skyfx64 Have you tried other channels, such as 40/48? @Kevin_Z Maybe Kevin can suggest further.

@Wifimohan Follow the instructions in this post to reset your router to factory defaults and configure a new password.

@skyfx64 When you say 5Ghz stopped working, does it mean no devices can see it, or the client devices can still see it but fail to connect to it? Which 5Ghz channel are you using? Some special DFS...

@WasiMaster C64(US) should support Onemesh in the original firmware. Are you using it in Router mode or Access Point mode? It only works in Router mode when using Onemesh. You can check for updates...

@jbra It seems only the new hardware versions can get the EasyMesh firmware, and there is no newer hardware for Archer C7. They have added EasyMesh on some of the new hardware models, such as Archer...