Grammar checking my properly written-up Wiki entries from notes of my Obsidian vault. Or finding names and acronyms, but I prefer to do that myself if possible.

To get a scale like that, I would just leave it up to extrapolation of the fundamental traits of your world. If my world was scorched, but I only write about a couple cities, you can imagine everything inbetween is a fiery hellscape too.

It's your universe, not AI's nor a professional's. Try to do as much as you can by yourself, if the world your building fits with you as a person, this should be easier than it sounds.

P.S - Proc-gen is not necesserily AI, but an algorithm. A set of rules to follow with given aguments for variation. This is why games such as No Man's Sky, that heavily use proc-gen, end up with repeating landscapes or planets. The algorithm was given similar arguments. AI is far more complex however, closer to how a biological brain determines something.