Here you go buddy - GitHub - Fetiska/Unreal-Procedural-Terrain-Generation-CPP: Procedural terrain generation in Unreal Engine using Diamond Square algoritm and C++
This is not my code, but some kid that made a good Youtube tutorial for that code, I recommend. I used that code/tutorial, but changed call to “native” perlin noise from example to use this library (UE 5.1).