Wireless Dex works with LG Nanocell TV, LG magic remote can be used as a mouse, and and it prompts an onscreen keyboard when you want to write a text. : r/GalaxyS9
How to Screen Share 'Wirelessly to Smart LG TV w/ Samsung Galaxy S20/S20+/S20 Ultra - YouTube
Living life with Samsung DeX exclusively, part 1: The journey begins - SamMobile