I think you’re good as long as you:

• never connect to internet
• disable Bluetooth if you’re not actively using it. This is good practice to avoid drive by Bluetooth attacks that your out of date tv is vulnerable to.
• decline TOS if you can
• disable all smart or AI settings, they’re just ads
• verify in privacy settings this is the case
• use an external set top box for playing content
• never allow firmware updates

I’ve never seen any evidence they connect to open networks or include 5G routers yet. Not that this is impossible, I just haven’t seen any actual evidence of these claims, and there are definitely grey hats running honey pot networks who would see this if it were the case.