I agree; the documentation of C++ functions is terrible to the point of being useless.
Often, you can decipher what a function does by pulling up the declaration and definition in Visual Studio and then reading the code the old-fashioned way. At best, that works but is a pain in the neck. At worst, the C++ code relies on obscure macros and other functions that require an equal amount of heavy lifting to decipher, and you go down and endless rabbit hole.
Google is your friend, and there’s a lot of good stuff on the Discord channel. But Epic could help us all out a lot by improving the C++ documentation.