Reverse Engineering USB Protocol (Samsung DeX)

Hello All, I am looking for help from the experts. If you own a high end Samsung Phone, you may be familiar with Samsung DeX. Based on my research, Samsung launches DeX on a virtual display on Android when connected to a HDMI dock or when connected to DeX on PC (MacOS/Windows). This virtual display is powered off when not connected to a HDMI dock or when not connected to DeC on PC.

I would like to try to trick my phone into thinking that a Linux PC is able to run DeX on PC. Where is the best way to start? I just need to figure out how to start the DexUI on display 2, I can already interact with the secondary display. Any ideas?