Simply create a Utility Wiget BP with a button. Then on click, GetAllActorsOfClass for InstancedFoliageActor and loop through them and destroy actor. You can do that in level blueprint as well.
Simply create a Utility Wiget BP with a button. Then on click, GetAllActorsOfClass for InstancedFoliageActor and loop through them and destroy actor. You can do that in level blueprint as well.