Oppo's upcoming Find X3 Pro will use a Samsung-made AMOLED screen with an LTPO backplane, enabling variable refresh rate between 5Hz and 120Hz. According to popular insider Ice universe the panel will be Samsung's E4 with 10-bit color support and it will be the first non-Samsung on the market with an LTPO panel. That latter claim could be challenged by the OnePlus 9 Pro, which will also have an LTPO display and will become official on March 8, three days before Oppo's Find X3 Pro. Of course the Oppo Find X3 Pro and the OnePlus 9 Pro could very well use the same 6.78-inch 1440p 120Hz...
Source: https://www.gsmarena.com/oppo_find_x3_pro_will_have_an_ltpo_screen_with_5hz120hz_adaptive_refresh-news-48075.php