How do I add a node to a blueprint with C++

There are no addons that add nodes to blueprints, that I can find.

“its a pretty simple setup operation” -_- If it were simple I’d have it done already. I’m on hour #38 trying to simply add a node to an event graph. Frustration abounds.

Clarification: Not trying to make a function “blueprint callable”, I’m trying to add a callable function node to a graph.

Useful:
Exact syntax
Or link to example

Not helpful: “It’s simple”.