Just received word from LG that they're working on a beta firmware to add 4K 120Hz Dolby Vision support to other 2021 TVs & 2020 @UHD4k OLEDs including the CX & GX. When the beta firmware is ready (soon, at least 1 month away), owners can request it from local LG service centres.

— Vincent Teoh (@Vincent_Teoh) June 21, 2021