I’m not quite sure what you mean by
but, the input system has changed recently.
I used to be that you specified inputs in the project settings, and then the nodes appeared in your blueprint. That was called ‘action mappings’.
The new system is called ‘enhanced input’, and relies on you initializing the system from code
Then you can put the ( new ) nodes in your blueprint, but you also need to configure what the keys do
That part is somewhat similar to the old system, to use.