How to use Code (Node.js) to enrich profile custom properties?

I set up a Code, triggered by a custom event.
The idea was that when that event was triggered, a new attribute is calculated and added to the profile custom properties.
The problem is that the Code is never triggered, I set it live and I tested it and it works as expected within the test, but despite several events, I see the logs tab empty.
I also tried to use the “webhook success” trigger (with some filtering to only use the right webhook), but doesn’t work as well.