I am very interested in using a joystick as a pitch bend midi controller and have not yet found a solution.
I have just tried the demo version of MIJOY PRO which seems to work fine, but my enthusiasm fell when I saw that the plugin was 32bit. It is possible to bridge it to 64bit but it is useless because it is not even possible to buy it anymore and the developer’s website is closed.
I’m still looking for an equivalent but it’s not obvious.
As for the Reaper option, it seems that it only works for midi joystick, because the analog joystick is recognized as a remote control, and I didn’t manage to use it as a pitch bend controller.
Anyway I’m only looking for a GP use, for Reaper I use a keyboard wheel.