The latest update for the Samsung Galaxy Fold enables DeX on PC. This mode allows you to connect the phone to your Windows or Mac computer via a USB cable and use the computer's monitor, keyboard and mouse. This means you can edit Office documents using a full size keyboard or game with the extra accuracy of a computer mouse. Plus, it's easy to drag and drop files between the two devices. Note that the Galaxy Fold already supported the DeX mode where it connects directly to a monitor. However, unless you have a dedicated monitor (and keyboard/mouse) for the Fold, DeX on PC is more...
Source: https://www.gsmarena.com/samsung_galaxy_fold_gains_dex_on_pc_feature_with_latest_software_update-news-40280.php