I've had reasonable results from using AI to analyse code ("convert this code into a method call graph in graphml format" or similar). Apart from hallucinating one of the edges, this worked reasonably well to throw this into yED and give me a view on the code.

An alternative that occurred to me the other day is, could a PR be broken down into separate changes? As in, break it into a) a commit renaming a variable b) another commit making the functional change c) ...

Feel like there are PR analysis tools out there already for this :)