Hello. I'm back, bought the game for a third time now. I'm not the most organized fellow.
I recently purchased a VKB Gladiator - K Pro. It has the ability to have 128 programmed buttons.
My problem is that WOTR does not seem to recognize any button past 32.
Is this game limited to 32 programmable buttons ?

It's possible, my stick is a Ravcore Javelin which has 29 but has a button to switch usage. Can't say I have programmed that many.
Try using another utility to map to joystick to key presses maybe and assign that way? Vjoy or another tool may help.

I think it's a limitation in the windows (Direct X) joystick protocol (one 32 bit word for button states).

I was able to figure out how to assign keyboard commands to the buttons 33 to 41. Using the VKB software.

Old DInput.DLL used in games limit buttons usage in 32 + 4 POV HAT (more than 1 require game support) per controller.

Limit that still being used in the obsolete (Win 95 legacy) Games Controllers in Windows control panel.
But for test purpose software like VKB Button Tester or similar software from VirPil see up to 128 buttons + 4 POV HAT,
as well the keymapper JoyToKey or Joystick Gremlin.

New DInput.DLL allow games use up to 128 buttons per controller (joystick, throttle...) examples
IL-2:GB (Bo'X) up to 64.
DCS World (and I think X-Plane) up to 128.