As per your query, Samsung DeX is a feature included on some Samsung mobile phones that enables users to extend their device into a desktop-like experience by connecting a keyboard, mouse, and monitor.
Kindly perform the following steps to connect the tab with the window.
The DeX cable lets you connect your phone or tablet directly to a monitor without the use of any other accessories. Step 1: Connect the USB-C end of the DeX Cable to the port on the phone or tablet, and then connect the HDMI end to a TV or monitor's HDMI port. Step 2: Tap Continue. Step 3: Tap Start. Step 4: Swipe down the notification panel. Step 5: Tap on and use your phone as a touchpad. Step 6: Your phone has been connected to the monitor.
Screen mirroring in Dex: Step 1: Navigate to the Dex icon using touchpad mode. Step 2: Tap on "Tap here to switch to screen mirroring". Step 3: Screen mirroring has been opened.
In case the issue persists, kindly share the report of the problems with a log file. To share a log file, click on the Samsung Members Application (Open Samsung Members Application > Support> Tap on error report > Type your query > Send).
