Interesting that its HDMI is 2.0 and not 2.1. Hopefully it's still possible (for those that really want) to connect modern 4K TVs at 120 hz via the DisplayPort 1.4 output.
That said, there are signs that it's coming to the AMD drivers. [1] [2]
[0] https://arstechnica.com/gadgets/2024/02/hdmi-forum-to-amd-no...
[1] https://www.techpowerup.com/348723/amd-readies-full-open-sou...
[2] https://www.fosslinux.com/157755/hdmi-2-1-on-linux-complete-...
DisplayPort 1.4 should be enough to do 4K@120hz. Not enough bandwidth for HDR at the same time though