So out of curiosity I searched to see if there ever was a OLED tv made with standard traditional RGB subpixels and to my surprise there actually was one made back in 2013:
https://www.blvdhome.com/product/samsung-s9c-series-55-1080p-oled-smart-tv-black-kn55s9cafxza-60614
Only thing is that it’s only 1080p and it’s out of stock and probably cost a fortune to find on the market these days. Still a Interesting find.