Here is a DeX Adapter that gives me higher than FHD 1920x1080. : r/SamsungDex
Usb C To 4k Hdmi Adapter Dex Station & Dex Pad Alternative For Samsung Galaxy S10/s10e/s9/s8plus/note8/note 9/tab S4 Desktop Exp - Mobile Phone Docking Station - AliExpress
DeX Cable Mobile Accessories - EE-I3100FBEGWW | Samsung US
The Beginner's Guide to Samsung DeX | Samsung Knox
Gimme introduces wireless DEX adapter | Vending Times
USB C to HDMI Adapter for Samsung DeX,Desktop Experience for Galaxy S22/S21/S20/S20 FE/Note20/Note10/Note9/TabS7/S7+/S6,DeX Station with HDMI 4K,USB3.0,USB-C Charging,SD/TF Card Reader,Nintendo Switch : Video Games
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Amazon.com: USB C to HDMI Multiport Adapter for iPad Pro 2021/2020/12.9/11,Samsung DeX,Dex Station Pad for Galaxy S21/S20/S20 FE/Note20/TabS7,USB C HUB with HDMI 4K,USB3.0,USB-C Charging,SD/TF : Video Games