Hey there @fejjac! Welcome to the community! So the landscape in UE is a bit harder to directly change at runtime as most of it is not exposed without building from source. Most users tend to roll their own custom meshing system if you need to edit terrain during runtime. A good resource would be to look into procedural mesh generation. Or if you’d rather, you could look into some of the other solutions others have used like the voxel plugin.
Disclaimer: Epic Games is not liable for anything that may occur outside of this Unreal Engine domain. Please exercise your best judgment when following links outside of the forums.
This is also not an ad, it’s just a really good plugin:
Hope this helps!