Shouldn't this hub be able to output 2560x1600 @ 120hz? Highest I can get is 75hz.

Hub: Cable Matters 8-in-1 Portable 40Gbps USB4 Hub (USB 4 Dock) Dual DisplayPort 4K@60Hz, Single DisplayPort 8K@60Hz, 100W PD, Gigabit Ethernet

Cable: LDLrui DisplayPort to Mini HDMI Cable 1m, 4K DP to Mini HDMI Cord, Supports 4K@60Hz, 2K@120Hz Video UHD

Monitor: UGame C2 Pro -144Hz Gaming Monitor 1600P 16" 2K Portable Monitor Display w/VESA

I'm using the above config and the highest I can achieve is 60hz. I then tried buying the below adapter to switch it to USB-C delivery and the most it can hit is 75hz.

Adapter: OHBUYAGN 8K@60Hz USB C to DisplayPort 1.4 Adapter, Bi-Directional Compatible DisplayPort to USB C Adapter, Thunderbolt 3/4/5 to DP Converter.

I've enabled high resolutions on Good Lock, though I'm not sure if that would affect the refresh rate.

I can't work out why it's not hitting 120hz, so I must be doing something wrong here but I'm clueless as to what it is?