I built an app that exposes Samsung DeX on the Galaxy A56 so you don't have to.
Starting in One UI 8.5, the loophole in the settings search for 'keyboard' was fixed, so you can no longer access it that way. The features are still there, they're just hidden. I made a simple utility tool to trigger those DeX-related activities in the Settings app; feel free to use it. No special permissions are required just use it as is to access Samsung DeX features that are available on our devices but hidden.
https://github.com/dogpoopy/dexdashboard/releases
Note: This was only tested in Galaxy A56
Disclaimer: This is a 100% free, open-source project. I am not getting any kickbacks, ad revenue, or anything of the sort. I’m only sharing the GitHub link so anyone interested can audit the code to see exactly what the app does and confirm it’s just a simple activity launcher.