Thank you @Juan Luis and @Nok Lam Chan for your feedback!
I noticed that nothing showed up on Kedro-Viz and wasn't sure if that was expected.
In the current state I am tinkering with some prototypes at work and on my own.
I expect that how to visualize a hook could depend on what its triggers are. The trickier cases might be where a hook has multiple triggers that would be naturally visualized in different ways.