RF software person here. I strongly encourage anyone reading this headline to take it with a MASSIVE grain of salt. There hasn't been any conclusive science on the issue and people aren't dropping dead from cell phone death rays left and right.

The RF emitted by cell phones and even 5G systems is many orders of magnitude lower energy than the light you're exposed to all day. The only connection we know of at the moment would be through RF heating but that requires way more radiated power than anything you will likely interact with unless you stick your head in a microwave oven.

Edit: also, things RF can interact with are dependent on feature size. 5GHz has a wavelength of ~6cm so in the same way that you can't see a virus with a microscope because it's too small for light to interact with, it's just not going to be able to cause localized heating on anything smaller than about 3cm. The singular scientist in the article is mostly just taking issue with the testing methodology and wants software to minimize RF emissions to the lowest level possible for communication which is already the case as otherwise your battery would be depleted very rapidly.