I"m having same issue did you ever resolve? I have installed the display link, I did the privacy action and my result two black screens nothing. 2023 Mac Sonoma 14.5. I have the computer connected to correct spot at back and I've placed the monitor cords in the designated 1 and 2 slots at the back as well. I'm using this model:
https://www.amazon.ca/dp/B0CP8Z2D83?...t_details&th=1