Scientists in Germany have demonstrated a startling new form of surveillance: identifying people using nothing more than ordinary WiFi signals. By analyzing how radio waves bounce around a room, researchers can effectively “see” and recognize individuals — even if they are not carrying a device and even if their phone is turned off.
You being wired doesn’t stop WiFi seeing you.
It will in my own home when there is no wifi.
I suspect it applies to 5G phone signals too (because they are in a similar frequency) so you need to live where there are no nearby 5G masts and all your visitors must use Faraday bags.