In order to correctly configure this parameter, you need to enter the name of the action from the input system in the Input Action Name field:
Please note that the names must match to work.
After we have set a new action, we need to configure the button on which it will be called, for this we go to <No Binding>
Then we go to Path and there we select the platform we need and select the key.
If you can't find the key you need in the list, but you have the right gadget at hand, then you can click on Listen and then click on the button you need on the gadget and this button will be added to the list below.