Hi!
My old laptop died and IT gave me a shiny new... M1. Sigh.
I'm running:
Big Sur 11.2.3
DisplayLink 1.3
Generic J5 Create Driver for USB 3 to HDMI adaptor
DisplayPort 1.2 adaptor
I have a Caldigit Ts3 Plus
I have HDMI, I have DisplayPort, I have HDMI to USB 3.0.
Going straight Laptop to CalDigit to DisplayLink (with nothing else plugged-in) never generated video on my screen.
Going straight laptop to CalDigit to USB 3.0 only mirrored my laptop
DisplayLink has never detected a monitor.