The 2020 CX and GX models have anti burn-in features. Specifically, the TV will detect static parts of an image likely to cause burn-in by monitoring them for 2 minutes. If they remain unchanged for that time, the tv will reduce the brightness of specifically those static pixels by 20% over the course of 90 seconds, which reduces the chance of burn-in so far as to be infinitesimally small. In addition, the TV will run maintenance and diagnostics on its pixels when it sits on standby for long enough as well.
All of this is beyond the fact that most use-cases for this TV run no risk of burn in by default. Only static pixels, like a logo for a news channel or a static HUD in a game run the risk of burn-in, and that risk only becomes measurable when the news channel or game is displayed on the TV for hours and hours daily for months. Unless you're an 8 hour a day gamer, or planning to use it as a computer monitor that you keep on 10+ hours a day, you run practically no risk of burn-in.