On a previous version of Display Fusion, (I don't remember which), the PWD (Prevent Window Deactivation) function allowed me to keep the game in focus and allowed controller inputs to interact with the game while alt-tabbed to another window on a different monitor.
Keyboard and mouse inputs were still registered by the selected window, which made the PWD function a bit inconvenient, unless the game rejected keyboard and mouse inputs, while registering controller inputs.
Games that do that, yet do not support Borderless Window mode is where the PWD function comes in handy.
After performing a clean install of Windows and installing the latest version of Display Fusion Pro on Steam 10.0 (Beta 21), the PWD function no longer performs the same as it used to.
It maintains focus for games, windows, and everything else, as intended, but shows no effect when used on Genshin Impact.
It no longer permits any keyboard, mouse, and controller inputs to go through the selected game while alt-tabbed to another window.
Tested toggling the "Force Old Window Focus Method" and saw no changes.

Hi,I had the same issue and figured it out. Use version 9.7.1 it works with genshin on that version.