LG announced support for Dolby Vision at the launch of TVs such as the 2021 OLED C1- and G1-series. Now, the OEM has released the firmware that activates this spec on these devices. Moreover, the feature works with HDR at 4K/120Hz for certain gaming platforms, thus potentially elevating the experience on the systems in question.
https://www.notebookcheck.net/LG-gives-some-premium-2021-TVs-more-of-a-gaming-edge-with-an-update-to-Dolby-Vision-HDR.548266.0.html