@Happyhenry You should be able to turn off Hub 3 WiFi without switching it to Modem Mode. You are correct that having both Hub3 and Deco WiFi will end in issues. Either way is OK. Just giving you...

@Saint_Kat Powerline adapters will complement your current setup. You will need pair of standard no-frills powerline adapters that support Deco Ethernet backhaul. You will place one of adapters in...

@Happyhenry Yes, this is the only way, for Deco mesh running in its default Router mode. You will have more flexibility if you switch Deco mesh to run in Access Point mode. For that, you will have to...

@DeLynn In addition to what others suggested: 1. Check "Block List" in Deco app under More. If it has entries, remove them. Unlikely, but maybe these three devices were placed in Block List. 2. Your...

@Peter__M Increase QOS setting to at least 200 download and 200 upload, check speeds again. See How to set up QoS on the Deco.

@Saint_Kat Alternative option: if your garden pod is on the same power circuit breaker as some of electric outlets in the house, you might have better speeds if you could link pod's M5 with the house...