Billboard Device and TBT200

Why does Billboard Device appear in the Connected Device listings when connecting a TBT200 Thunderbolt 4 Dock?

If you see “Billboard Device” in the Connected Device listings, it is a component of your TBT200 Thunderbolt 4 Dock that your PC is identifying as a separate device.

The Billboard Device will disappear from the Connected Device listings after you disconnect your TBT200 from your system.