There are different “flavors” of USB-C cables, and they are NOT built the same. Make sure you’re using one rated for video content or at least 10GB/s data rate.
There are also some quirks in getting EnOS (and Wayland) to output to an external display. See this post for some ideas.
On the Tuxedo specs page here, it says this:
For connecting more than one monitor via Thunderbolt 4, we recommend using an USB-C-to-DisplayPort MST hub.
and for the left USB-C 3.2 port…
- Monitor connection only possible with NVIDIA graphics, because the port is hardwired to it. No DisplayPort available without NVIDIA graphics.
So it may not support external displays on the left USB port if you didn’t get the model with Nvidia GPU. If you have an HDMI port, I’d use that…or get a Thunderbolt4 dock and plug it into the USB4 port on the right.