No fast refresh rate besides mirroring - M2 air and D6000s

[Freeq]

Hi,

Bought myself a Dell D6000 Docking Station, so I could drive my extra one of my screens. However, it does not to output 120fps when in extended mode, no matter if I have it set to 120Hz or 144Hz, but when I set it to mirroring, it does 120hz fine.

Also in windows , it does 144hz no problem (with the d6000 displaylink)

Is this a known issue? What can I do to fix it? For reference: I am using a Macbook Air M2, D6000, macOS sequoia, newest version Displaylink manager

I know more than 60hz is not officially supported, but why does it work in mirrored mode or perfectly fine in windows?