Have you tried if there is any Hit event at all?
You can easily test stuff like that with the “Print String” node. It will print it’s string (on default “Hello”) in the top left corner of your screen.
Because if it isn’t there should be a setting in the “Components” tab. Take whatever is responsible for your collision (either a hitbox or more likely the mesh itself) and check in the defaults of it, if you checked “Fire Hit event” (or very similar. Just search for “hit” in those defaults).