A TV manufacturer doesn’t need to develop that PrivaTV from scratch, they can get their SmartTV and just rip out the Smart part, for a much lower markup.
A big manufacturer is one who’d have it easier; just need to make “privacy” into a selling point, then slap a “Private” sticker instead of the “Smart” one.
Hopefully with the “right to repair”, we might see some people ripping out the smarts out of a SmartTV, possibly just flashing an updated firmware, so that might convince manufacturers to give it a go too.