maybe. There is EMF readers. Most who work on mircrowave radios will have one, but they have EMF for residential use. Like to see how much is emiting from your computer or wifi.

What unplugging your WIFI router can do is a psychological thing -- which i am no expert on, but it could give people peace of mind.

EMF readers are inexpensive for the consumer ones. The pro-ones get a little pricy.

adding there is consumer long range WIFI antennas and those could be bad if one has them in their home. They are designed for farmers or ranchers and such so they have a far reach from their homebase. Usually those would be outside and up higher.