I have an iPhone 12 and do both my parents. None of us are upgrading. I would guess it's only an issue if you spend all day with a phone against your ear. Moderate users probably okay.
Trusting anything on Facebook is a sure way to get worried, often needlessly. Having said that, if you can upgrade for free then why not.I was more alluding to the mental market manipulation of something like that coming out days before the new phone comes out. My parents saw it on Facebook and called me worried about it. Luckily with the Verizon trade deals they can upgrade for free and out their minds at ease. I’m not really worried about the radiation.