Permission for Screen Recording
Yam Display records the screen of a Mac and displays it on your iPad/iPhone. macOS Catalina or later requires permission from user for screen recording. When Yam Display is launched for the first time, it will ask for the permission. Please allow Yam Display from the list and relaunch the app.

Installation of Yam Display driver and other permissions
macOS Catalina requires permissions for loading and touch gestures. Please refer to Yam Display for macOS Mojave for the details.