Hello @debbie and thank you for your interest in our Community.
Since macOS Catalina, your system requires the user to permit “Screen Recording” for DisplayLink driver to work properly. Approving it enables the DisplayLink to access the pixels it needs to render a mirrored or extended screen and send the pixels over USB from your computer to the DisplayLink display. It does not send any data or pixels back to DisplayLink. It is simply how Apple named this permission which rather refers to accessing and controlling your display, which is needed in order to generate such display.
We certainly do understand the confusion around the permission’s name. You can read more about it no DisplayLink’s Knowledgebase article here.
I hope this helps! Please let us know if there is anything else we could do to help.
Emmanuel B.