Just turn it down to use 4G. Sometimes I'll use LTE for meetings or big downloads. 5G - hard no. I sleep with my phone and Wi-Fi off. Don't knock it till you try it. Get a meter if you are serious about it.
Those technologies would either need extremely high power, and/or use much much higher frequencies (beyond visible light) then fall into ionizing radiations (which are dangerous indeed) to have any health effects.
Did you also paint the doors, windows, ceiling and floor?
If you want further information, talk to the people who build shielded rooms. Cutting down EM radiation by more than a few db is incredibly difficult.
Plus you can't effectively earth something when your earth leads is multiple wavelengths long (eg at UHF)
Regarding "not treating the the floor", how to you prevent reflections? If there's any metal beneath the floor it will reflect the signals into the room.
Whatever, if your meter is reading "less than background" then it is clearly misleading you.
How did you come to the conclusion it disrupts sleep?
But hey it works for me, enough that I invested significant time, effort and a bit of money to get a decently shielded sleeping area.
I have better concentration during the day in these same low emf conditions too.
I don't think this is what the 5G conspiracy theorists claim, at all. Nobody is claiming people are going to drop dead from 5G.
The last 50 years have seen a dramatic rise in incidents of various less-than-lethal health issues: low sperm counts, autism, fibromyalgia, early puberty in girls, Chron's Disease, IBS, certain specific rare-but-treatable cancers, etc.
These are all very real and well-documented. And everybody has their pet explanation that happens to correlate with environmental increases of other things: sugar, seed oils, microplastics, glyphosate, vaccination, VOCs, birth control, and yes, mobile phone usage or HF exposure in general.
5G conspiracy theorists just happened to pick one of the possible correlates. You'll find anti-glyphosate crusaders on this very site who don't get nearly the vitriol that anti-5G people, or, god forbid, anti-vaxxers do.
But in the end, people are pattern-matchers, and evidenced-be-damned, this one particular pattern they spotted is the one they're going to go with.
Conspiracy theories of the pattern-matching type are kind of a built-in human problem, I think we're wired for it. I don't understand why we can't be more charitable towards them.
Would be silly to discard such a nicely tuned learning model.