I’ve been trying to toy with procedural generation myself. Unfortunately, there’s not a whole lot about it out there. Here’s one thing I did find:
It’s not a “how to” but you can download the code (all blueprint) from the epic market and dissect it to learn how he did it. I went through the code of that project to figure out a number of things. I didn’t use any of those things, but it gave me ideas about how I could do things.
There is also a free procedural level generator on the epic market
This is mostly C++ but you can again dissect it to see how’s it’s done.
And then there’s the much more complex
The source is available. I haven’t looked into this one myself, but I’m assuming C++
And if you’re willing to spend 20 bucks, someone already did it for you: