this monitor should support 70hz, but it's not an option under xorg nor wayland. i'm able to manually set it with a modeline but it looks worse than 60hz. i'd suspect this is the cause of my modeline and not what it should look like, unsure.
you can manually configure 70z using a custom modeline. however, there's such a bad frame jitter/stutter/lag(?) from this i'd rather go without
xorg:
$ xrandr --newmode "3840x2160_70" 609.84 3840 3872 3920 3960 2160 2163 2169 2200 +hsync +vsync
$ xrandr --addmode DisplayPort-0 3840x2160_70
$ xrandr --output DisplayPort-0 --mode 3840x2160_70
hyprland:
monitor = DP-1, 3840x2160@60, 3200x0, 1.33 # 60hz, looks better
monitor = DP-1, modeline 609.84 3840 3872 3920 3960 2160 2163 2169 2200 +hsync +vsync , 3200x0, 1.33 # 70hz, looks worse