Hi Empire8842,
Welcome to Microsoft Community.
I'm Hahn and I'm here to help you with your concern.
I'm sorry to hear that you're having trouble connecting your Surface Laptop 2 to your TV via HDMI.
According to the Surface Laptop 2 technical specifications, there is only one full-size USB 3.0 port. However, the USB 3.0 interface itself does not support video output, but through a USB 3.0 converter or adapter, the video signal can be converted to USB 3.0 format and then output to a monitor or other device that supports USB 3.0 input. This conversion usually requires specific hardware devices or adapters to achieve.
Surface Laptop 2 specs and features - Microsoft Support
To do this, you may need to contact the manufacturer of the docking station you purchased to see if it supports this feature.
I hope this helps. If there is anything not clear, please do not hesitate to let me know.
Your Sincerely
Hahn - MSFT | Microsoft Community Support Specialist