Why? Ganymede almost certainly contains 30x more H2O than all of Earth (water + ice). Titan, about 14x (just the liquid H2O), Callisto, about 4x, Europa, about 2x.
Why, again, would there not be (mostly underground) ice on Earth’s moon?
Underground ?? This is bryond is fiction. It has to be underground because we can’t see it. There is no oxygen on the moon. Absolutely zero. There is no water. There are no little green men or cheese. This is made up to get people to increase the national debt to 23. Trillion to make work for geeks. Let Leon musk go mining for moon dust . Not me.