@natajacks Yes, it should be fine. See How to add an additional unit to your Deco network

@David-TP This will be Wi-Fi 7 Deco without support for 6 GHz band. Asking for clarification here, because even TP-Link's own document "What is Wi-Fi 7?" has table comparing different WiFi protocols...

@Goamute There is no configuration setting: Deco will always use Ethernet link if it can. Which means, your X50-Poe can't. That usually comes to Ethernet cable issues or something with the switch, or...

@RokC For what you want, this is not the right product. Amazon has return policy - use it.

@Bfassler The script and how to run it: 1. Hardwire Windows PC/laptop to "office" Deco; 2. Disable WiFi adapter on PC/laptop - to make sure it won't switch to WiFi when losing Internet through wired...

@Bfassler Device such as Roku, when it has strong link to WiFi mesh node, will not switch to a different WiFi mesh node without a reason. Especially, if that another WiFi node has weaker WiFi signal....