Egpu on internal display GPD win 4

Hello! I have a 7600 m xt egpu and I would like to run it through tunderbolt 4 into my gpd win 4 and use my GPD's internal screen as the display for the EGPU. I understand this will cause a drop in performance and I am fine with it. I am looking for help on how to set the EGPU as the GPU of choice for the internal display.