.dlls do not seem to load on linux using unity 6

[Woodshape]

I followed the installation instructions and copied the files from the Unity folder (from the Release page) into my Assets/Plugin folder inside my unity project.
Everything seems fine, no errors inside the editor.
But I cannot use the Steamworks .dlls files inside my project.
Maybe something is not being built into my assembly? I do not see any issues or warnings, simply nothing...
I am using the default Assembly-CSharp unity provides.

Unity version: 6000.0.25f1
Linux: Pop!_OS 22.04 LTS 64 bit

Any help at all is greatly appreciated.