Okay let me show you a setup I got, which uses a delegate like you try to do. I have a Component that I made called “Use”. When I put that component on a blueprint it adds a Use Event to it so that I can interact with the environment. It looks like this:
Notice that the OnUse(Use) event does not have “Custom Event” underneath it. This is because it’s my Component “Use” event and not just some custom event.
The way I can call it is to Right-Click my Use Component and choose “Add Event”. Then click “OnUse”. It will add it to the blueprint for me.