Samsung G9 Monitor at 240hz impossible on Ubuntu?

I tried installing Ubuntu 21.10, however my max refresh rate is limited to 120hz with an odyssey G9 .

240hz is available at lover resolutions, Nvidia plz fix.

Driver: 495.44

Kind regards a new Linux user.

The nvidia driver doesn’t support DSC yet:
https://forums.developer.nvidia.com/t/8k60-output-with-rtx-3070-and-samsung-q900ts-over-hdmi-2-1/167227/25