I actually don't have any sort of Dex/AR setup. Currently only have my phone's screen. Admittedly I've only tested it. Haven't actually done a coding session yet. So total typing time on that keyboard is minimal. So I guess all I can say is I'm happy with the build quality and design. The bluetooth switching between devices is pretty slick.
https://www.amazon.com/iClever-Bluetooth-Keyboard-Foldable-S...
Wouldn't recommend for extended typing though.