One issue is that a general visualization tool might have have a lot of problems jumping from a codebase in language X to a codebase in language Y (let alone a mixed codebase). MS seems to have this Code Map tool but it looks like it's for C# / VB mainly, with some C++ support.

https://docs.microsoft.com/en-us/visualstudio/modeling/map-d...

In many cases it might really be faster and easier to just diagram things out with a pad of paper and a pencil compared to setting up a tool like this and getting all the parts working correctly without any bugs.

That said, a virtual reality 3D tool for visualizing code base dependencies, internal structure, what parts call what other parts, internal exception handling etc. would be pretty cool. Maybe it's an area where AI machine learning could do something.