There are people who put their seed phrases in faraday bags in order to avoid frequencey-based breech attempts to their keys. Perhaps even a malicious broadcast of frequency from a...smart TV!!

No but seriously, without telling us what make and model of smart TV, we have no way to speculate if there's a camera or not. The idea of a camera on any smart device isn't outside the realm of possibility, but
hidden by the manufacturer? That's unlikely.
It's always best to perform any sort of seed-generation, seed-backup, and other seed-related activities in a room with 4 windowless walls , and with no smart devices connected to the internet at all anywhere nearby. Some people even plug in a fan for white noise so the keystrokes on let's say...an air gapped PC can't be recorded from a distancd via audio-spying.