I just bought a smart Vizio TV which is reputed to be spying on you. It has an ‘opt out’ feature which I engaged. I still don’t trust it though.
Just use your user manual to locate the camera and tape over it.
Problem solved.
Now, if it has a built in mic, that may be tougher to find.
Another complication, services like Amazon fire TV or Netflix which use voice recognition may be compromised.