Logitech wheel ppsspp

[LunaMoo]

You can try my custom version from here, disable "simple UI"(which hides most rarely used options) and check the option under controls settings to enable dinput along xinput gamepads which I didn't really tested, but should be doing exactly what it's name says.

PPSSPP by default disables dinput when xinput device is connected as a workaround to some gamepads which can use both dinput and xinput at the same time(without any toggle to switch between), it's pretty bad workaround that tries to streamline user experience and at the same time make it impossible to loose gamepad controls in menus(by hardcoding some). PPSSPP emulates handheld, it never had a reason to support multiply controllers at the same time and with the hardcoded menu controls for both dinput and xinput controllers, it's actually a sane solution to simply disable one of them.

You should understand that your case is very unique and those others emulators you mention I'm guessing either don't have a nice GUI at all or don't care about making it idiot-proof so should really not be compared. The behaviour might change in the future, but it's not really a bug as explained above.