Samsung One UI 3.1 update on flagship smartphones has brought DeX wireless support on PC to more Galaxy flagship smartphones, as per a report. In order to use the feature, the smartphone and the output device should be connected to the same wireless network.

source https://gadgets.ndtv.com/mobiles/news/samsung-one-ui-3-1-update-dex-wireless-support-on-pc-galaxy-phones-flagship-2379192#rss-gadgets-all