I created a side project ~3 years ago based on a similar idea. It was before LLMs were a big thing, and AI could render the code relationships for you.

I started with go and java (the two languages I was using in my job) and built AST parsers that would extract the relationships between the classes and functions and draw them with graphviz. Then I created a filter syntax based on regex to filter the graphs.

I never followed through on the idea to a production ready version, but it helped massively as a personal tool when working on unfamiliar codebases.

The site is still here, but lots of it is probably broken by now..

https://packagemap.co

I did something similar but for non-classes based language (Go) and in 3D [1]

But I saw it as next step towards shifting programming from sitting and scanning texts into something more tangible, where developer has broad overview of software, and can work on smaller parts while seeing context of how these parts are connected. Ended up concluding that this stuff should work in VR.

[1] https://divan.dev/posts/visual_programming_go/