@David-TP Thanks for the reply! I actually got on a chat with TP-Link yesterday, and we explored nearly every option individually, including your suggestions. The few that we didn't try while chatting I looked up and tried myself later on. I still have no resolution to this sadly, but the issue has now been sent over to the senior engineers and I'm waiting for a reply once the holiday ends. Hopefully we'll get a resolution that way!

  @Laynexsiren 

You can try this: bring Satellite Deco to where PS5 is, and connect them by Ethernet cable. See if that works and PS5 gets Internet connection when wired.

Not sure if this is one of the options you've tried already, but if not - give it a try.

  @Alexandre. I just tried this and successfully got through to the internet via LAN, even got the notification from the DECO app that the PS5 connected. I then tried to connect again via wifi, and still received a failure.

Unfortunately, due to the layout of the home and the fact that there are actually 2 PS5s on the property and both are experiencing this issue, I can't move the router and satellite to positions to LAN in with the consoles without leaving a good 1/3 of the home without wifi access. For testing purposes, connecting via LAN works beautifully, but it's sadly not going to be a functional solution!

  @Laynexsiren 

If nothing else works, you could buy one more Deco W7200 2-pack. I expect TP-Link Support figure why PS5 can't connect to Deco by WiFi, but this is an option. Your in house WiFi coverage will only improve from having four Deco nodes instead of two.

  @Alexandre. Yeah, that's our last resort. I'm going to wait to see what the senior engineers have to offer, but if nothing comes of that, I'll be buying another 2-pack at the end of the week!