Quest 3 is not turning off the WIFI

For health reasons I need to reduce to the minimal expression the Electro Magnetic Fields so my house is a almost perfect zero EMF zone, that changed with the Quest 3 which even though says that it turns off or on the Wifi I know with the help of a sensor Acoustimeter that the EMF are exactly the same with the Wifi ON and Wifi Off, I would like to know if there’s a way to REALLY disconnect the Wifi.