This is my setup:
In Samsung Dex Resolution settings, the option to use UWQHD (3440X1400) and WQXGA (2560x1600) are grayed out. I want to use UWQHD. According to Samsung Dex website, I can use any hub to connect my monitor to my tablet, so I'm not sure what the issue is.
If anyone has any advice on what the issue is, please let me know.