I don't think it has something to do with VPN, even though I'm not using one on any of my devices. It should be based on the router, not the device where the Deco app is installed. It's okay now. I...

@Alexandre. Huh. That's weird and unfair. Lol! Kidding. I don't have the update on my app and it's updated as always. The router's support page doesn't show the new firmware either. Thanks, though!

I noticed that there is a new firmware update, released on Dec. 24, for Deco M9 Plus. However, I don't see the update on my Deco app, not even on its web interface. I am in Canada with Deco M9 Plus...

@TP-Link I am still hoping Deco will support HomeKit.