Hi ,
I dont have a PS5 Controller but i also dont use Heroic Game Launcher . I like to use Lutris Game Launcher . There you also can libretro ( Retrobox ) runner or others to use and configurate it to my needs. Maybe you can try it here for a game if its Working. With antimicroX if not already installed:
Install over the Terminal : (enter)
sudo pacman -S lutris
sudo pacman -S antimicrox
Example: ( i just use my saved profile not both but maybe one of them working)
