Doesn’t bother my Apple Watch when I’m cooking, and the tech in that is a sight more complex than a Dexcom, and it is of course nearer the induction hob. The technology, by the way, means that effect is entirely local. If you remove a pan from the hob, it no longer heats, even 1cm away. It’s
You could also worry, if you like, about your microwave oven, or phone. It’s daft to do so, because their “waves” aren’t strong enough to damage DNA. We are, after all, awash with radio and TV ‘radiation’, that’s how come TV aerials and portable radios work.