Scatter lots of instances from a MeshLibrary that contains both meshes and colliders, using physics in the editor.

When a ThrowOut node is selected You can convert spawned RigidBody3D objects to MeshIntance3D, MultiMeshInstance3D, or StaticBody3D instances via a menu at the top of the viewport. You may also set various control settings in the inspector.

Try it out in action with the demo scene at addons/throwout/demo/.