Mac Studio M2, Ventura Ultrawide display

I’ve just received my new Mac Studio M2 Ultra. I’ve plugged it into my Samsung G9 OLED 49” display, but the resolutions available do not cater to my screen. YouTube videos mentioned 3840x1080, but even that resolution is not available in Ventura. According to the spec sheet, M2 Mac Studio should have HDMI 2.1 supporting 8K, but the OS is not allowing that.

Please update OS with resolutions up to 5120x1440 please.

I’ve spent over $100 on different cables trying to resolve this but nothing works. It seems the OS is just stopping the ultra wide resolutions.