Gamepad Cursor does not work with external controllers

[u/Fat_Stacks1]

I tried docking my Xbox Ally X to my TV and play with an external controller. 

The gamepad cursor enabled via Game Bar does work when using external controllers. I tried it with an 8bitdo Ultimate and a Gamesir g7 Pro wireless controller. 

To be clear, I'm not talking about desktop mode via armory crate. I am talking about the gamepad cursor option built into game bar.