Maybe you can try shearching for it directly in the options:
Input → Debug Events → Keyboard Events
If you can’t find it like this, you can try by adding an input to your “Input Mapping Context”:
-Create the input action:
I called it “INP_Test”
-Add the input to your “Input mapping context”:
-Then select a key for the input:
-Finally if you setted it correctly you’ll find the Input Event:
Hope this 2 ways will be helpful