you will need to add Yuzu as a non steam game in desktop mode then you can find it in game mode on that tab. before launching any games at least for me I have to use the touchscreen to launch them at first.
As for input, check the controller settings then go to controller layouts and the community tab, some people have made layouts for it. you might have to experiment with different ones a bit till you find one you like though.
you will need to add Yuzu as a non steam game in desktop mode then you can find it in game mode on that tab. before launching any games at least for me I have to use the touchscreen to launch them at first.
As for input, check the controller settings then go to controller layouts and the community tab, some people have made layouts for it. you might have to experiment with different ones a bit till you find one you like though.