In reply to @jmgomez "Makes sense. UE is": I'm planning on using PCG as well.
I'm slowly chipping away at making a city generator. The hard part is making it
load/unload different parts of buildings depending on player location. Each
bulding will be multiple floors with fully explorable interiors. So buildings
will be generated via simple code, floor layouts via wave function collapse and
room contents via PCG 🙂 And then tons of procedurally generated volumes to
load/unload things. (inspired by Shadows of Doubt)