Autogenerating function documentation seems like such a low bar by comparison. It's like taking limited creativity and applying it with high powered tools.
Literally like asking for a faster horse.
Tell me how WebKit generates tiles for rasterizing a document tree. Show me specifically where it takes virtualized rendering commands and translates them into port specific graphics calls.
Show me the specific binary format and where it is written for Unreal Engine 5 .umaps so that I can understand the embedded information for working between different types of software or porting to different engines.
Some codebases are so large that it literally doesn't matter if individual functions are documented when you have to build a mental model of several layers of abstraction to understand how something works.