The seemingly straightforward solution is that SpaceX needs to be legally required to get into the radio astronomy business. As part of being allowed to launch such noisy satellites. If they are going to wreck radio astronomy on Earth's surface, they should have to launch orbital radio telescopes of such quality and quantity that SpaceX is actually a vast net boon on radio astronomy. This should simply be a legally required cost of doing business if they want to launch so many noisy satellites. Yes, these orbital telescopes would have a finite lifespan and need to be regularly replaced to be updated, but thankfully the greatest rocket company on Earth will be legally required to launch them regularly.