I am guessing this project was dropped. That is a shame. I have been looking for something like this for Unity. I have several level generators, but nothing quite like this. I am certain many people would be willing to pay for the source code to this.
Viewing post in ProMeLaGen - Procedural Metroidvania Layout Generator comments
I have this habit of telling the truth and then having that truth punch me in the teeth. Tests reporting passing is one thing... running the scripts developed off of those tests and seeing completely unexpected results is something else entirely. I am not a good programmer but I do have worlds being generated with rooms that follow biome rules but the rooms themselves still look like crap, aren't navigable... it's honestly a mess that I keep having to take back to the drawing board. But the room generation is currently the only real blocker I am noticing right now. The tilemaps just don't "platform" the way I want. Having said that... When complete, I plan on making a simplified version of it open source... but there will be a more complete iteration that will require purchase from the Unity Asset Store and/or here.
I want to say I will have it done soon... but I get easily distracted and discouraged. lol. If the developer of this one makes ProMeLeGen open source... I can do like mentioned and see about taking it over. But that leaves the same issue: room interiors. I have tried several algorithms so far and none have worked quite like I wanted. The attached image is a python version I am working on just to try to make working on it faster. I plan on bridging the python to both Unity and Unreal if I can manage, again, to get the room interiors working.