Digable 2D Terrain

Make 2D Terrains and dig down through the ground.
pipeline compatibility

Add destructible terrain to your game environment.
The destruction is based on line intersections.
You can easily make different shapes of terrain by moving editor handles.
The terrains have 2d colliders.
There are 9 different ground materials.
(Note : It doesn’t work with 2D Sprite Shape)

https://assetstore.unity.com/packages/tools/level-design/digable-2d-terrain-200544