@kallekoo Deco mesh will not join standalone powerline solution, but TP-Link powerline adapters may be able to work separately from PX50 and provide wired (Ethernet type) link to garage. This is how...

@lenzki Satellite Deco will always deliver half of the speed of Main Deco. Have you tried powering off satellites and run speed tests with device connected to Main Deco. You should be getting close...

@kallekoo Plc (powerline adapters) that you tried, what is their brand name and model number? I had successfully connected two Deco with powerline adapters.

@Fabson Archer AX23 is not compatible with Deco mesh. You can turn off its WiFi and use it as wired router together with Deco mesh, or research EasyMesh compatible gear from TP-Link that will work...

@sr0981 If you need Web management interface, you should return Deco and try different WiFi mesh. With Deco, it is only through the app on smartphone. I feel your pain, I am old school Web/cli...

@nick100998 The maximum WiFi speed you could get from Main Deco M4 will be in the range of 500Mbps-600Mbps. It is because M4 only supports WiFi5 protocol. For M4, WiFi5 theoretical speed limit is...