I understand that the TBT-UDC1 docking station is not officially supported under Linux, but I suspect it will work with a bit of elbow grease. Someone already asked this question at https://support.plugable.com/t/linux-support/18505 but the topic ended without resolution.
I am using Ubuntu 20.04. I can see the device under “boltctl” and it is authorized. The USB ports work for mouse and keyboard, and the Ethernet works. However, I cannot seem to get it to recognize a DisplayPort display I have connected. If anyone has any tips to do so, or information I could provide that might lead to that outcome, please let me know. It seems like it should “just work” but no dice so far.