UWB should solve that (if it works), and it would enable lower power consumption (which AirPods need).
Still cell phone radiation is bad when the phone is touching the head, but nowadays most use headphones.
But we are awash in so many frequencies, both naturally occurring, and man-made. From damn near everything in our houses, our cars, radar, lidar, Bluetooth, ANT+, 802.11X, cell phones, point-to-point communications, satellites, and natural sources like the sun, the universe, and all of it. More and more are being generated and rained down on us. Starlink, GPS, weather and surveillance satellites...
Adding a hand held cellphone isn't going to push someone off the ledge, but it is a concentrated source, and headphones and ear buds just add a small amount to it all. The cellphone industry isn't likely to allow the publication of damning research. But by now, it's far too late anyway...
I remember the Nextel phone I had, and if I carried it over my heart, it would occasionally appear to cause skipped heart beats. It would also cause the FM radio in my car to freak out on occasion. I'm so glad I didn't use that thing very long. Yikes...
But back to the proposed New Airpod Pro's. I hope they have a way to find them when they fall out. I could care about the case. They could include Air Tag tech in it and skip the speaker/transducer, but if the buds don't have 'Find My' in them, it's a deal killer...