@klapaucjusz1 All Deco models I listed will work with the network you described. Two switches is not a problem as long as they are compatible. I have Deco unit connected to 5-port switch, which in...

@klapaucjusz1 TP-Link has large selection of WiFi 6 capable Deco mesh models. I'll give you my recommendations for three different price and performance segments. Budget: Deco X20. Recommended...

@klapaucjusz1 a) Is it possible to create the network described above? Yes, it is possible with Deco mesh. b) which systems would be suitable for this network? This is TP-Link Deco forum. Deco is...

@Toto7 Check hardware version of your Deco M4. If it is V4, there is firmware for it that can let you configure how Deco connect to each other: https://community.tp-link.com/en/home/forum/topic/581554

@DivineJimmi Connecting two routers to two Deco Ethernet ports will not work the way you want to. Also, it is not very common configuration for home network to have two routers. Do you have two...

@my2108 TP-Link offers two WiFi mesh systems: OneMesh and Deco. They are not compatible. Powerline adapter TL-WPA8631P description says "OneMeshTM - Works with your OneMeshTM router." You can use...